VB6.0 in windows XP and windows 7

I'm using windows 7. I installed visual basic 6.0 in my laptop but I can't drag the object to the form faster.
The movement of the mouse is smooth. I try using VB6.0 in another laptop with windows XP O.S. and it works normally.
Why VB6.0 is slow in windows 7 but can run normally in windows XP and what will I do to speed it up when I want to use windows 7 as my O.S.?
