Ports I have in the past have run remote assistance until I installed a new 2wire modem\router. The computer that I try and connect to also has a new siemens gigset se567.I can connect to computers in my network using remote assistance.So I would believe it is a port issue . here are the errors I recieve when attempting to use remote Remote Assistance connection could not be established because the remote host name could not be resolved. Please try again. A Remote Assistance connection could not be established. You may want to check for network issues or determine if the invitation expired or was cancelled by the person who sent it. Hope you can help Mike

trying to connect for remote assistance using messenger 8.1 about 20 miles. Road Runner ISP on both ends. My end has linksys wireless router, hard wired, his end had Belkin fsd 7123-4p, he is hard wired too. we get the same message over and over. I connected 2 days ago to another friend 5 miles away, same ISP. "Remote Assistance connection could not be established because the remote host name could not be resolved. Please try again." XP firewall down both ends. He says his router firewall is off.  trying to connect for remote assistance using messenger 8.1 about 20 miles. Road Runner ISP on both ends. My end has linksys wireless router, hard wired, his end had Belkin fsd 7123-4p, he is hard wired too. we get the same message over and over. I connected 2 days ago to another friend 5 miles away, same ISP. "Remote Assistance connection could not be established because the remote host name could not be resolved. Please try again." XP firewall down both ends. He says his router firewall is off.