Unable to Send Mail

[JC1455]

I have a couple of Virtual PC images setup as build machines. One of them works fine. The other one works fine except at the end of the build when it is supposed to send mail it instead fails with "Error connecting to SMTP server: Network connection aborted by local host". Both machines are XP SP2. Both machines are in the domain. Both machines are logged in as the same user. Both machines are running the same VisBuildPro script (and therefore using the same user/pw, server and port when trying to send mail). On the machine that fails I can ping and telnet to the e-mail server on port 25. So I think the connection is there. If there anyway to get more information out of the Send Mail step about what is failing or does anyone have any other suggestions to try. Are there any setup requirements in order for Send Mail to work on a machine? Maybe I need to install something? I checked and saw mapi32.dll is there I assume Send Mail ends up using that. I'm using VisBuildPro 6.1. Thanks for any help you may be able to provide.