In running this example, and using port 49341, I get this error and am clueless (be nice guys) :
After clicking GetRemoteThread, at this line of code:

"txtRemoteThread.Text = CStr(calc.GetThreadID)"

I get, "No connection could be made because the target machine actively refused it 127.0.0.1:49341"

Clues? Thanks.
SLGinPS

The short answer is I'm not too familiar with that chapter, but I don't think I have enough information from you to answer your question.
Are you using 127.0.0.1 in the configuration or localhost? I'm not in a position to test but have you verified your firewall isn't blocking your connection (the local windows firewall)?

If you still have this issue could you please send a copy of your config file for your service?

Thanks,
Bill