SmartFTP with ISA2004

Has anyone got any idea how to get SmartFTP to work with ISA2004?

I have a rule allowing Socks (1080) and FTP (21), I have enabled the Socks application filter and have configured SmartFTP to connect to the ISA box using Socks V4. When connecting I get the follwing error:

Socks4: Permission Denied

When I look at the ISA log I see a connection initiaited on port 1080 and then closed.

This is driving me loopy because I can get this work with Proxy2 without any problems.

ps...I am unable to use the ISA 2004 Firewall client due to an issue with authentication and local accounts.