�nformix I-Net Problem

Hi, We currently doing a project which we will carry all our terminal based client appications to windows. Our database is Informix 5 running on Unix SVR5 on a U6065. For this purpose we started to work but we had to stop at the very beginning. All our project team setup the required drivers. (INet-5.0) But only two of our pc's could communicate with Informix database server. The strange thing is that when we replaced the IP numbers of the working pc's with the non-working PC's they could also communicate. So, the result only two ip numbers work. We called the technical people form the local Informix but no progress. They told us this situation may be caused from the misconfiguration of our network but nothing else. But this response does not seem reasonable to me because all the other TCP/IP applications work fine but this I-Net stuff. Does anybody have an idea about this problem? Thanks in advance Coskun KIRAC Middle East Technical University Computer Center coskun