Unable to Parse Configuration File (again..)

I know this has been addressed multiple times, but I have thus far been unable to fix my "Unable to parse configuration file" problem: I am trying to install php4 on NT4 running IIS3. Last year I installed php3 on this system with no problem, but I cannot get past the config file error with php4 . (Prior to the php4 installation, I removed the php3 files). I installed php4 into D:\php: using the Windows installer. I've assured that the appropriate dlls and php.ini are in the proper directories. I am trying to access PHP via odbc (which according to the documentation is preconfigured -- along w/ MySQL-- with php4). I would try changing the php.ini extension_dir to D:\php, but I can't get to the server this weekend. Is there any reason to believe that would fix my problem?) By the way, I installed php4 on my home W98 test system running Xitami w/ no problem (installed php into c:\php on this system). Thanks for any help you can provide. Lenny Harris