Touch Drag is working on Window 7, not working on window 8

Question

hello guys ,

 

I am developing WPF based desktop application. I have Implemented Touch drag and drop functionality. Its working perfectly on Window 7 . But on window 8 its not working.

In window 8 , when i am doing double tap on any file(image , mp3 or video) and then drag the content , then its working fine.

 

But this behaviour is wrong, I want the normal behaviour as working on window 7 (Simple touch and drag  the file)

 

 

Please help me.