Dragdrop and dialog problem

Hi All,
I am having dragdrop and model dialog in same page. And using jQuery
1.5.3 for dragdrop and jQuery 1.6cr4 for dialog.
If I include jQuery 1.5.3, dragdrop works fine. but dialog fails.
if I include jQuery 1.6cr4, dialog works fine. but dragdrop fails.
Can anyone help me on this,
I am in urgent need.