Can you telnet port 3389? Or this search result may help.
Troubleshooting Vista Remote Assistance Issues
Troubleshooting Vista Remote Assistance issues. Case 1: I received the
invitation, but can't access the remote computer. The problem if the client
forward ... http://www.chicagotech.net/vista/vis...assistance.htm
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Sabian Smith" <22@xxxxxx> wrote in message
>I get the following error when I try to establish a Remote Assistance
>Session (novice requesting help from me):
> "Remote Assistance Cannot Make the Connection. The remote user user may
> have disconnected".
> Both systems are Vista, running the latest version of Windows Live
> Messenger (8.5.1302.1018). Both systems are behind routers, but each has
> UPnP enabled: WLM Connection Status states "You are connected to the
> Internet though a uPNP port-restricted NAT". Windows Firewall is OFF and
> there is no antivirus firewall. In System Properties, "Allow Remote
> Assistance.." is checked.
> After trying to connect, both systems are prompted to type a password, but
> the error comes up after passwords are entered.
> Interestingly, if *I* make the request for remote assistance from the
> "novice" system, everything connects perfectly.
> Any ideas - I have googled this for hours? Do I have to setup port
> forwarding if uPNP is working as it appears to be??