Anyone else having trouble getting php extension for memcache to work on CentOS 4?

I got the daemon up and running fine but the php extension wont load.

I got it compiled and installed correctly. The .so file is in /usr/lib64/php4 with all the other working modules.

I tried adding extension=memcache.so to the php.ini and I tried loading it by creating memcache.ini in the /etc/php.d/ directory with the same directive. Still no luck.

I know that php on CentOS is not comiled with --enable-memcache, but I've seen this extension load correctly without that option before.

PHP version: 4.3.9-3.22.5
Memcached version: 1.2.2
memcache version: 2.1.2
libevent version: 1.3b