"Table X does not contain a column named Y" while inserting data into SQLite database

I got an error while inserting data into my database.

01-28 20:59:06.277: I/Database(553): sqlite returned: error code = 1, msg = table tableKo has no column named phone
01-28 20:59:06.309: E/Database(553): Error inserting phone= email= address= name=
01-28 20:59:06.309: E/Database(553): android.database.sqlite.SQLiteException: table tableKo has no column named phone: , while compiling: INSERT INTO tableKo(phone, email, address, name) VALUES(?, ?, ?, ?);
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1536)
01-28 20:59:06.309: E/Database(553):    at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410)
01-28 20:59:06.309: E/Database(553):    at com.example.databasetest.DBHandler.insertData(DBHandler.java:76)
01-28 20:59:06.309: E/Database(553):    at com.example.databasetest.MainActivity.saveButtonHandler(MainActivity.java:39)
01-28 20:59:06.309: E/Database(553):    at java.lang.reflect.Method.invokeNative(Native Method)
01-28 20:59:06.309: E/Database(553):    at java.lang.reflect.Method.invoke(Method.java:521)
01-28 20:59:06.309: E/Database(553):    at android.view.View$1.onClick(View.java:2067)
01-28 20:59:06.309: E/Database(553):    at android.view.View.performClick(View.java:2408)
01-28 20:59:06.309: E/Database(553):    at android.view.View$PerformClick.run(View.java:8816)
01-28 20:59:06.309: E/Database(553):    at android.os.Handler.handleCallback(Handler.java:587)
01-28 20:59:06.309: E/Database(553):    at android.os.Handler.dispatchMessage(Handler.java:92)
01-28 20:59:06.309: E/Database(553):    at android.os.Looper.loop(Looper.java:123)
01-28 20:59:06.309: E/Database(553):    at android.app.ActivityThread.main(ActivityThread.java:4627)
01-28 20:59:06.309: E/Database(553):    at java.lang.reflect.Method.invokeNative(Native Method)
01-28 20:59:06.309: E/Database(553):    at java.lang.reflect.Method.invoke(Method.java:521)
01-28 20:59:06.309: E/Database(553):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-28 20:59:06.309: E/Database(553):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-28 20:59:06.309: E/Database(553):    at dalvik.system.NativeStart.main(Native Method)

      

        
        
        
      

    

I am using a separate class that extends SQLiteOpenHelper to handle my database. I am already searching the internet to find out how my table has no column names, here is my code: My main class

package com.example.databasetest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {

    EditText nameET;
    EditText addressET;
    EditText phoneET;
    EditText emailET;

    String name;
    String address;
    String phone;
    String email;

    DBHandler handler;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        nameET = (EditText)findViewById(R.id.nameET);
        addressET = (EditText)findViewById(R.id.addressET);
        phoneET = (EditText)findViewById(R.id.phoneET);
        emailET = (EditText)findViewById(R.id.emailET);

        name = nameET.getText().toString();
        address = addressET.getText().toString();
        phone = phoneET.getText().toString();
        email = emailET.getText().toString();
        handler = new DBHandler(this);
    }
    public void saveButtonHandler(View v) { 
        handler.insertData(name, address, phone, email);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

      

        
        
        
      

    

and this is my database handler class

package com.example.databasetest;

import android.content.ContentValues;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DBHandler {

    public static final String TABLE_NAME = "tableKo";
    public static final String DATABASE_NAME = "databaseKo";
    private static final int DATABASE_VERSION = 1;
    private static final String TAG = "DBHandler";

    public static final String COL_ID = "_id";
    public static final String COL_NAME = "name";
    public static final String COL_ADDRESS = "address";
    public static final String COL_PHONE = "phone";
    public static final String COL_EMAIL = "email";

    private final Context context;
    private SQLiteDatabase db;
    private MySQLiteOpenHelper DBHelper;

    private static final String CREATE_DATABASE ="create table "
            + TABLE_NAME + "(" + COL_ID
            + " integer primary key, " + COL_NAME
            + " text not null, " + COL_ADDRESS + "text not null,"
            + COL_PHONE + "text not null," + COL_EMAIL + "text not null);";
    public DBHandler(Context ctx) {
        this.context = ctx;
        DBHelper = new MySQLiteOpenHelper(context);
    }
    private static class MySQLiteOpenHelper extends SQLiteOpenHelper{
        public MySQLiteOpenHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
        }
        @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            try {
                db.execSQL(CREATE_DATABASE);
              } catch (SQLException e) {
                e.printStackTrace();
              } 
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            Log.w(TAG, oldVersion + " to " + newVersion
                    + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
            onCreate(db);
        }

    }
    public DBHandler open() throws SQLException {
        db = DBHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        DBHelper.close();
    }
    public void insertData (String name, String address, String phone, String email) {
        open();
        ContentValues values = new ContentValues();
        values.put(COL_NAME, name);
        values.put(COL_ADDRESS, address);
        values.put(COL_PHONE, phone);
        values.put(COL_EMAIL, email);

        db.insert(TABLE_NAME, null, values);
        //db.execSQL("Insert into " +TABLE_NAME+ " VALUES('"+COL_ID+"','"+name+"','"+address+"','"+phone+"','"+email+"');");
        db.close();
    }
}

      

        
        
        
      

    

What's wrong with my code? Thanks in advance for your help.