3 contexts 2 domain

Hi, I have two contexts (web | eng) and I have 2 domains (.pl | .com). The thing is that I want to add another context. I want to add third context but on the .com domain. So as I presume there is a conflict between two contexts using the same domain? now I get the 503 error when I'm trying to access third contexts documents. Any ideas how to get around it?
btw. I am using revo 2.2.2 and gateway plugin/context router (I don’t think that it's a plugin problem but...:)