Don't Panic over this message about Fid 0x0 it looks bad.

The message looks bad but if you search the forum for that message you'll see a reply from Roger (from Empeg) about it.

Its caused when your RioCar does not have any song currently playing from any playlist.
Normally this would be the case when you've just uploaded songs and have never played any of them and the unit is new.

hmm, sounds like you doesn't it - new player, just uploaded some songs, never played any yet, harmless, but serious looking message.

Wait until tomorrow morning before you do anything else.

And rest easy - its probably easy to fix.