Ubuntu :: "invalid Encoding" For Files On NAS?

I've recently switched from Windows to Ubuntu Studio (11.04), and my only remaining problem is the encoding of the file names in my music collection. The music files are on a D-Link DNS-323 NAS, and were put there in Windows. The files with accented characters look like this in the terminal:

04 V? ?kur? ?.m4a

and they look like this in Nautilus: This is the relevant line in my /etc/fstab:

Code:
//192.168.0.6/Volume_1 /media/dns_323 cifs iocharset=utf8,username=admin,password=speaker,file_mode=0777,dir_mode=0777 0 0

Many people seem to have solved this problem by adding the iocharset part, but it isn't working for me. I also tried nls=utf8.I've looked into using convmv to change the file name encoding, but I'm having trouble with that, too. I've read that Windows uses UTF-16, but when I try:[code].....I only half understand any of what I've tried to do,