the vpn client would connect sucessfully. but after the post connection script, the client won't be moved from quarantine to vpn network. rqc run with the error code (-1 - general error). is there a way to debug/test the rqs/rqc tools
That's correct. The VPN Q piece is a programming platfor, so unless you're a programmer, its not much use. There are some third party solutions for it, and the ISA hardware firewall vendors are working on the problem, but from the ISA firewall admins point of view, the VPN Q isn't worth much without a programmer on staff.
I would start with a basic test. From a remote user, try to connect the TCP port of RQS.. just to see if it is opened. Defaut is 7250.
The TCP port is the one you used when you installed the RQS on the server. Check registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Rqs to make sure. Also you should see the SHAREDKEY that must be the same between the registry, and the command line you run on the remote machine.