SSO with Classic Asp

Multi tool use
I am in the process of trying to implement Single Sign On for our classic asp parts of our site that run on a separate server. I have already implemented the php SSO on our other server using simpleSAMLphp. I am attempting to use shibboleth right now for the classic asp / IIS side of things. I have made it as far as getting to the login page of our Identity Provider, but once I authenticate I get stuck at /SAML2/POST and a webpage saying that the ip address of my server cannot be found. I have tried implementing fixes I found in forums but still have not made any progress. I am wondering if there is another tool that I could try to implement SSO with classic asp with? I am open to any suggestions at this point.
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