Unable to Load Modules (php_oci8.dll)

I am trying to run oracle, mysql, and mssql with php using Apache on Windows 2000. Apache would not start when I tried to load certain extensions in php.ini. Some extensions work and others do not. Mssql and oracle both would not work. I read somewhere that putting libsasl.dll in the winnt\system32 directory might work so I did that and it fixed php_mssql.dll, but neither of the oracle dlls will work. I suspected that apache might be the problem so I tried BadBlue and it still does not work. Everytime I try to load a php script it gives me a popup error box that says "Could not find module d:\php\extensions\php_oci8.dll" when I know for a fact that it is in that directory as well as many others. Is there another file I need to add to system32 that php_oci8.dll requires? I never ran into this problem installing oracle and php on win98 and PWS. - Doug