Unable to load php_ldap.dll

I have been having some trouble getting php_ldap.dll extension to load. I thought it might be my extension_dir variable, but another extension ldap_mysql.dll loads just fine. I'm trying to do ldap authentication in my Mantis install running under Apache. extension_dir = "./extensions" Contents of c:\php\extensions php_ldap.dll       php_mysql.dll Error: [Wed Apr 12 11:38:32 2006] [error] [client 10.0.0.17] PHP Warning: PHP Startup: Unable to load dynamic library '.\\extensions\\php_ldap.dll' - The specified module could not be found.\r Anyone have a solution for this? Thanks, Mike