Is there anyway to solve my problem?
EDIT:
Now I connect again, and it just show up as I:/ and I can see .rockbox and stuff! Only the whole map 'music' is showed empty. How can that be?
EDIT2:
When I connect now, and look at it in Winamp, it says no music files are in it. :s But if I start player with rockbox (without USB) I can see music, and with the original fimware too. Is there anyway to connect player in rockbox to usb?