PLEEEAASSE HELP!!!!! "The filename, directory name, or volume label syntax is incorrect."

"The filename, directory name, or volume label syntax is incorrect."

I just bought this external firewire harddrive. I recorded a song for a client. I went to burn the file in Nero. Inside Nero I decided to change the name of the folder it was in. Now I can NOT open the folder and the file names changed. The files are now named:
q4
o
r4
q4f
etc.

and if I try to open the folder I get this:

W:\q4[] is not accessible.
The filename, directory name, or volume label syntax is incorrect.

The drive is formatted in Fat32, but my PC is NTFS internally.
Win XP Pro
Maxtor External Firewire 500GB drive

Also when I turned the harddrive off and turned it back on, the partition names all changed to "Local Disk".

PLEASE HELP ME RETRIEVE THE DATA!

Thank you in advance,

Michael