can you tenet port 3389? or post the invitation here.

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 
 I'm having the same problem.  I saw one posting in here that suggested it was
 because of firewall settings on the ISP and that it could be resolved by
 sending the request via Outlook with a couple additional lines in the
 request, but now that I'm looking for the additional lines, I can't find
 them.  The people I'm trying to help even turned off their firewall in XP for
 the duration of the request, but still nothing.  I haven't had this trouble
 with other connections.
 Very frustrating!

 "Robert L [MS-MVP]" wrote:

 > You may need to change the IP address from private to public.
 >
 > remote desktop
 > How to fix the error "Remote Assistance connection could not be established
 > because the remote host name could not be resolved"? ...
 > www.chicagotech.net/rdesktop.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 
 >   "Theillbehaviored" <Theillbehaviored@discussions.microsoft.com> wrote in message news:8D11035E-041F-4C5E-935E-F8AD5339DC14@microsoft.com...
 >   When I try to connect to some of my friends it says "Remote Assistance
 >   connection could not be established because the remote host name could not be
 >   resolved. Please try again." does anyone know what the problem is?

Theillbehaviored wrote:

Robert L [MS-MVP] wrote:

First - you need the requestor to have configured their equipment (remotely)
correctly.  I assume they are behind some sort of router.  They need to
configure that router to forward port 3389 requests through to a particular
machine on the other side of that router/NAT device.

Second - Their software firewall (if they have one enabled) has to allow
remote assistance through.  It's a simple checkbox in the Windows Firewall
settings and the addition of port 3389 to other firewalls.

Third - you want to get emailed the request and you want to open it to
verify you have their external IP address and not the NAT IP address of
their computer.  If you have the NAT address (usually 192.168.x.x) -- you
will need to edit that and save the file.  (See the last link...)

Fourth - they must be around when you accept the request.

Some helpful remote assistance links..

Overview of Remote Assistance in Windows XP
http://support.microsoft.com/kb/300546

Using Remote Assistance to Get Help When You Need It
http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/remoteassist/i
ntro.mspx

HOW TO: Obtain Remote Assistance Using Windows Messenger in Windows XP
http://support.microsoft.com/kb/306556/

Start a Remote Assistance Session from Windows Messenger
http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/remoteassist/v
iaim.mspx

HOW TO: Provide Remote Assistance In Response to Windows Messenger
Invitation in Windows XP
http://support.microsoft.com/kb/306800/

HOW TO: Obtain Remote Assistance by Sending an E-mail Message in Windows XP
http://support.microsoft.com/kb/306757/

HOW TO: Provide Remote Assistance in Response to an E-mail Invitation in
Windows XP
http://support.microsoft.com/kb/306791/

Start a Remote Assistance Session by Sending a File
http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/remoteassist/v
iafile.mspx

Step-by-Step Guide to Remote Assistance
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/rmassist.mspx

Provide Remote Assistance When Using a NAT Device
http://www.microsoft.com/windowsxp/using/networking/learnmore/tips/jackson1.mspx