IIS situation - php as an ISAPI

I have question concerning using PHP as an ISAPI. My problem is this. I set up IIS4 (running on WINNT4.0 sp5) and it runs fine for a bit, then eventually I receive an error that effectively shuts down the W3C service. This is not good. The error I am getting is "NT could no load http filter %DRIVE%:\PHP\php4ts.dll. The error is the yada yada yada". This is irritating me as I have to get this server up and running and so far this is my only problem. I have moved the file from that directory to the \WINNT\SYSTEM32 dir as well as the \WINNT\SYSTEM dir. My ISAPI filter is in the \SYSTEM32\ dir. Please advise. Thanks. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp