ISAPI Error 500

[Envision]

We are evaluating abyssws as an alternative to IIS for our clients. We have a delphi isapi soap application that works fine under iis5/6 that will not run at all under abyssws.

I've added it to scripting parameters, script virtual paths. Normally I test installation by invoking the wsdl, but nothing appears to trigger that.

Copy same dll to IIS, set the application exception list, and the same dll works.

I created a simple demo isapi soap server using D2006 with demo interface, that doesnt work either. I enabled all logging on isapi and get the following.

Here is the log i get when i issue the following url: http://localhost/script/webtest.dll/IWebTest

Module: C:/Program Files/Abyss Web Server/htdocs/script/webtest.dll URI: /script/webtest.dll/IWebTest Request #1 New request
Module: C:/Program Files/Abyss Web Server/htdocs/script/webtest.dll URI: /script/webtest.dll/IWebTest Request #1 Prefetch-ReadClient() = ""
Module: C:/Program Files/Abyss Web Server/htdocs/script/webtest.dll URI: /script/webtest.dll/IWebTest Request #1 HttpExtensionProc() = HSE_STATUS_PENDING (3) / ecb.dwHttpStatusCode = 0

The same url on IIS returns the wsdl doc.

Am I missing something? I can email the webtest.dll to you if you need.

Thanks.