Can't mount samba shares

[David McGlone]

for some reason I can't mount my samba shares. Here is what dmesg spits out at 
me:

[10345.520000]  CIFS VFS: Server requests plain text password but client 
support disabled
[10347.828000]  CIFS VFS: Send error in SessSetup = -13
[10347.960000]  CIFS VFS: cifs_mount failed w/return code = -13

Anyone have any ideas? I've never had a problem before.

Thanks,
David M.