hey, I think i know how to fix it, but im at college, so itll be short and snappy.
Either plug the cable into a diferent USB port,
Or, only turn the GP on after youve double clicked PC link, then turn it on, and go to pc link mode, then on ure computers click OK
Or, Download a different version
Or, push a to check memory card, try again but dont plug the cable in till after uve gone to pc-link mode on the GP32
none of these are echnical, but one of them, cant remember which one, fixed it for me