[SLL] help getting CentOS 5.3 to log into Active Directory

[John Aldrich]

I've got a new CentOS 5.3 machine here and I'm trying to install Kerio Mail 
Server, but the machines won't talk. I've found a how-to on HowToForge.com 
specifically about this, but I'm getting problems with initializing 
kerberos. I run kinit <username at domain> and then it prompts for my 
password, which I enter. Then it kicks out with "KDC reply did not match 
expectations while getting initial credentials."

Any idea what is going on? I can post my kerberos config if that would help!