I have a very strange problem. That is, I have 3 computers at different places. Now I want two of those(A and B) to connect to the same computer C with mstsc.exe. The firewalls of all these computers have been closed. It works fine when I use the computer A connect to C. But when I use computer B connect to C, it shows that "Remote computer is not online" -- typical connection error message. However, I am sure B can connect to C because I can "ping" C in B. Then I use A to connect B, it works fine too. In short, B can be connected, but it can't connect to other computers. I don't know what might cause this problem. By the way, A and C use the same ISP, but not so does B, but I don't think it will cause this problem, does it? I'll appreciate any kinds of help. Thanks a lot.