[Samba] mount.cifs problems

[Vernon A. Fort]

samba-3.0.3-5 on fedora core 2.  I have successfully joined the domain 
and can access samba shares from windows clients/server.

I can connect to windows 2003 shares using smbclient but I cannot mount 
windows shares on using either smbmount or mount.cifs
Using smbmount, I always get "cli_negprot: SMB signing is mandatory and 
we have disabled it" - I do have  the following:

   client use spnego = yes
   client signing = yes
   server signing = yes

Using mount.cifs - all I get is "mount error 13 = Permission denied" and 
dmesg returns

     CIFS VFS: Send error in SessSetup = -13
     CIFS VFS: cifs_mount failed w/return code = -13

Can someone point me in the right direction?!?

Vernon