NEED HELP!

i need help with my mp4 plus video player please thanks

You will get that error message if the device is locked while it is plugged into your computer. If that isn't the case, I don't know why it wont work.

Ok, First of all remember that this is 1 gig player and you have to make sure you aren't copying more pics than you have room for. I have one of these players (just got yesterday) and so far everything works great, music, voice, and video. I have found to view the photos you have to copy them into the root of the drive, otherwise I get a "type error". Also check on the size of the photos you are trying to copy. If you use high res mode on your digicam those pictures are going to be large(4 meg each) and display very slowly.