Infinite ce problems?

this guy made infinite ce 4 me, i unzipped the file and transfered it to my psp/saveddata folder.
When i check in my saved data utility, its there and not corrupted.
When i start socom ftb2, and it's loading from my memory stick it says that it could not load becuase it contains something from another psp. i did everything right, could it be the file he made. If not, what could the problem b?
By the way, i deleted my old data and i did everything else right, it must be the file but how do i fix the problem?

u gotta have his mac address, and btw he gotta have ur mac address when he make inf ce

don't worry, it finally worked finalllyyyyY!!!!!!!