Trying to use cfpdf to sign pdf

I am trying to sign a pdf using the following ...

<cfpdf action="sign"
source="#expandPath('.')#\tempFiles\unsigned\form - unsigned.pdf"
destination="#expandPath('.')#\tempFiles\signed\form - signed.pdf"
keystore="C:\Program Files (x86)\Java\jre1.8.0_121\bin\KeyStore.jks" 
keystorepassword="testpw"
keyalias="mystore"
overwrite="true" pages="1" height="100"
width="100" position="100,100" author="false"/>

      

        
        
        
      

    

I created a keystore using keytool.exe, but I get the error

Keystore file C: \ Program Files (x86) \ Java \ jre1.8.0_121 \ bin \ KeyStore.jks does not exist.

But it does exist ... I hope someone can help me with what I am doing wrong.

Thanks in advance.