freeze on 64 bit system migration from 32 bit to 64 bit system


I recently moved from a 8800GTX on a 32 bit system to a Tesla on a 64 bit system. My application previously running fine on the 32 bit computer now causes random freeze on the 64 bit system. My code is rather large and I have no idea what could cause the problem.

Do you know what may cause issues when migrating to a 64 bit system?