Whenever you single touch on your mobile screen it work properly but for multitouch you are getting a problem. I think you have a problem in your mobile phone setting so to solve this you have to set your setting as a default setting. For default setting you have to follow some step. Go to MENU> SETTING> PHONE SETTING> DEFAULT FACTORY SETTING. Click on it. It ask for your conformation. Click on "OK". Then it restart your mobile and change all your mobile setting. Now you can use multitouch option on your mobile phone.
In The Absence Of Light