Unable to load php_msql.dll

Hello, and thanks for your assistance in advance. I am running windows 2008 64 bit/PHP 4.49 and mysql. When I run my application, I get an error. When I check the php.log file it states: PHP Warning Unknown() Unable to load dynamic library c:\php\extensions\php_msql.dll - The specified moduel could not be found. Although that is the error, I know it is there. When I run dependency walker I see that php.exe cant find GPSVC.DLL IESHIMS.DLL and LINKINFO.dll which all appear to be there. Any suggestions? Thanks Again.