Cube Process Slow in 64 bit

Hello,

I just migrate all my data from 32 bit to 64 bit and it successfully done.

But when I process the cube its much slower than 32 bit. 32 bit take 2 hr to process the cube and now 64 bit take 5 hrs to process the cube. I am using full process in both 32 bit and 64 bit. Roles are also present in Cube.

Thanks in advance for help.

Regards,
Naseer