#1 - Are you trying to restore .SPS files to your memory card?
#2 - Does your SharkPort work fine backing up files from your memory card to the PC?
#3 - What is the EXACT error message?
Can't help unless I have full details.
#4 - What version of the software are you running?
It could be as simple as trying to restore a V2 .SPS save with V1 software.