Swift 2.0: Unable to call argument list like ... (HTTP request)

Since I upgraded to Xcode 7, I have a bug that I cannot fix. Here's the complete code from my DataManager.swift

import Foundation
var TopAppURL:String = String()
var numberAsked:String = String()

class DataManager {


class func getInfo(ID : String){
    TopAppURL = "http://sweetapi.com/?=\(ID)"
    numberAsked = ID
    }


class func loadDataFromURL(url: NSURL, completion:(data: NSData?, error: NSError?) -> Void) {
    var session = NSURLSession.sharedSession()
        // Use NSURLSession to get data from an NSURL
    let loadDataTask = session.dataTaskWithURL(url, completionHandler: { (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void in
        if let responseError = error {
            completion(data: nil, error: responseError)
        } else if let httpResponse = response as? NSHTTPURLResponse {
            if httpResponse.statusCode != 200 {
                var statusError = NSError(domain:"com.raywenderlich", code:httpResponse.statusCode, userInfo:[NSLocalizedDescriptionKey : "HTTP status code has unexpected value."])
                completion(data: nil, error: statusError)
            } else {
                completion(data: data, error: nil)
            }
        }
    })

    loadDataTask.resume()
}

class func getDataFromSweetApiOk(success: ((IDdata: NSData!) -> Void)) {
    //1
    print("DataManager loads \(TopAppURL)")
    loadDataFromURL(NSURL(string: TopAppURL)!, completion:{(data, error) -> Void in
        //2
        if let urlData = data {
            //3
            success(IDdata: urlData)
        }
    })
}
}

      

        
        
        
      

    

So, I got this error: "Can't call" dataTaskWithURL "with an argument list like" (NSURL, completeHandler: (NSData !, NSURLResponse !, NSError!) → Void) '"I've been looking everywhere for how to fix this, but, since Swift 2.0 is very new I haven't found any solution.