[Samba] Can't mount Solaris share from XP Home

[Matthew Gork]

I have Samba 3.0 successfully running on a Sun Ultra with Solaris 10 OS.
 
I can see the Windows shares and get files from them by using smbclient.
 
However, I cannot successfully use "Map Network Drive" on the Windows XP side to mount the Solaris share.
 
When I try: 
 
net use Z: \\pam80\share /USER:matt 
 
and then enter the password for user matt it returns - 
 
System error 1326 has occured
Logon failure: unknown user name or bad password
 
I have run smbpasswd -a matt and smbpasswd -e matt. The windows account is also logged on as matt. All accounts have the same password. Any idea why it won't authenticate going from Windows to Solaris?
 
-Matt