i get that problem aswell at first i thought it was the cable but it couldnt be because the pc suite works fine. it fransfers some files without "parameter is incorrect" problem but with other files it says it. i am still able to copy things off the phone. also i only get the problem with music and photos. maybe it is something to do with the firmware on the phone. if your on contract you can get the firmware upgraded from where you bought the phone from. hope this helps and please post onto this thread to tell me how you get on. hope you fix the problem .