Error 10061, process 1: Unable to connect to remotemachine on port 1870

[m...@deform.com]

Hi, all

I have a setup problem to run a program through MPI
RemoteShellServer.exe.
I am using MPICH NT 1.2.1 and Windows XP professional edition.
Each XP box has two CPUs, if I run locally on each box by using of two
CPUs,
I don't have any problems. But if I try to run at another
computer(remotemachine),
I got

Error 10061, process 1:
Unable to connect to remotemachine on port 1870
Error 10061, process 0:
Unable to connect to remotemachine on port 1870

Each time I run, the port number increases.

I have a small testing program, it uses
CoCreateInstanceEx to connect to remote machine,
the error return code is 0x 80070005.
It means "Access Denied".
I tried various DCOM setup of RemoteShellServer at each XP box,
I still can not figure out.

Can someone point me a direction how to solve the problem ?

Thank you very much.

Best regards.
Michael Li