RPC Client Access

I just changed three servers from basic authentication to forms authentication so the OWA page appears and now 1/3 is hanging when I get into OWA. Haven't figured it out yet, but it is an issue. Strange because if I go directly to the server (server1.mydomain.com) in lieu of the external URL for owa which is the LTM (owa.mydomain.com) it works fine, just when going through the LTM I get a hang, can't access email, can't logout or do anything. I'll keep you posted. Still working on getting exchange web services online, the OAB, ECP and dealing with a certificate error I'm getting for outlookanywhere. =/ =/