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I just installed Apache 2 and PHP 5.1.2 on this Windows 2000 pc. All is well, phpinfo is returning what I expect, etc. But, I have an extension that I'm trying to use. That's not working. My PHP code says "Call to undefined function m_get()", where m_get is one of the functions in the extension. Here's what happens when I do php -m from the command line: C:\php>php -m PHP Warning: PHP Startup: Unable to load dynamic library 'C:/php/ext\php503_mgw.dll' - The specified procedure could not be found. in Unknown on line 0 [PHP Modules] bcmath calendar com_dotnet ctype date dom ftp iconv libxml (etc) As you can see from this, I added an "extension=php503_mgw.dll" to php.ini, changed the "extension_dir" in my php.ini to C:/php/ext, and I copied the dll to there (and also to C:/winnt/system32, for luck). I have tried all combinations of forward and backslashes, trailing slash in extension_dir, upper case, lower case, etc. So, what am I missing here? I don't think the dll is bad, but would this be the error message I would get if it was?