"Remote Assistance Cannot Connect"

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??
Thanks

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 ...
www.chicagotech.net/vista/vistaremoeassistance.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 DeleteThis @spamhere.com> wrote in message
news:eq5iExR8IHA.4924@TK2MSFTNGP02.phx.gbl...
>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??
> Thanks
>