[Samba] How to turn on SMB signing

[Victor Warner]

Using Samba 3.0.9-Debian on Linspire 5.0.59. Server running is a Windows 
2003 Server.

I am trying to mount a share on the server but getting error message: 	
	
	cli_negprot: SMB signing is mandatory and we have disabled it. 		
	8919: protocol negotiation failed
	SMB connection failed

In smb.conf I have changed setting "server signing = no" to "server 
signing = required" but this change makes no difference.

How do I get SMB signing turned on. Any help would be greatly appreciated.

Victor Warner