Hi,
As a thought from someone who knows '0' about CS, try uninstalling WGIC on the client pc and configure it to connect as a direct connection to the internet.
That way NAT will handle your requests and possibly pass the traffic you need to the host server.
Also a point to check is the adapter setting as in this post:
http://forums.qbik.com/viewtopic.php?t=2834 and that there is no Syslog messages from Authentication errors due to system policies in place.
Report back and someone will help further.