Extensions not working

Hello, I have installed php php 4.3.1 on Win XP Pro with Apache 2.0.44. The install went fine and it all works, however I now need to take advantage of php_gettext.dll. I edited my php.ini file by uncommenting the php_gettext.dll line. I then went to restart apache and got the error message that "Unknown(): Unable to load dynamic library 'c:\php\extensions\php_gettext.dll' - The specified module could not be found.". PHP appears to still load even with that error dialog coming up however gettext doesn't work. I experimented with other extensions and there are some that work (php_exif.dll) and some that don't. I have looked and the dll's are in the appropriate directory. Any one have any ideas on how to fix this? Did I skip a step somewhere? Is there something special that needs to be done for some extensions to work? Thank you, Chris Haidvogel Videk