Updated proftpd and now cant login

I have updated proftpd from another RPM (RPMFORGE) to proftpd version 1.34 and now i cant login with ftp users anymore.
I figured out that PAM is broken on this update so i commented out the PAM section in proftpd config, so now its working again.
Is that okay to use proftpd without PAM?
How can i revert back to the old proftpd version from virtualmin repo?
If i uninstall the RPMFORGE repo and then i uninstall proftpd , and reinstall again will it work?

To fix it i did
yum downgrade proftpd
that replaced /etc/proftpd.conf with proftpd.conf.rpmnew