McMaster

Hi, I am new to sccm so im not an expert so this may be a stupid question. I originally created a task sequence using a 32 bit image. i was just asked to create another for a 64 bit machine. i swapped the swapped the 32 bit image with the 64bit but however it keeps failing after it does the "setup windows and ConfigrMgr" step. Does anyone know what the problem is,,, ive read a few things about a registry porblem. please help??