Rick - we have some code that sends xml messages via from site 1 to site 2 using httpgetex. Normally site 1 and site 2 are on different servers. Sometimes site 1 and site 2 are on same server. If you recall my WWWC app is SaaS app. This means that if you run in file mode, you need two exe's running so that while one is busy waiting, the other can answer...

In COM we normally have 8 instances running so this is not a problem and feels like a web service type of deal... Well, we have a server running 2008R2 that can send from site 1 to site 2 when site 2 is a remote server, but not when it is local.

Ever heard of the OS blocking an inbound http call? Maybe there is just some server policy or firewall thing?