If it is timing out (rather than just running slow) I'd be looking at enabling and checking your php log. Rather than bothering with ISAPI I would give normal CGI a go as it's output can sometimes be a little more verbose than the other API's.
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Dominic Ryan
Microsoft IIS MVP
IIS Aid IIS and Open Source
387 Posts
Re: PHP very slow on IIS7
Jun 03, 2009 09:07 AM|brashquido|LINK
Dominic Ryan
Microsoft IIS MVP
IIS Aid
IIS and Open Source