10.5 OD Master 10.4 Server

I currently have a 10.5 server that is serving as an od master and a 10.4.11 server (hosting afp sharepoints) that I would like to connect to it. On the 10.4 machine in server admin, under open directory, I selected connected to a directory system and filled in all of the required information, including all of the kerberos info. The 10.4 server seemed to connect fine and if i went into workgroup manager on that machine I could see all of my OD users. However the problem came when I logged into a client and attempted to connect to one of the afp shares. It would present me with a kerberos login box instead of automatically mounting the share as it did when the od master was running 10.4. I tried demoting the afp server to standalone and then reestablishing the settings but that didn't work either. Sometimes instead of using the GUI i would run (from the command line) sso_util configure -r REALM.NAME -a admin -p password all, which seemed to execute ok except for the following error "Unable to configure service http error = 2". This also happened after i deleted the keytab files and started over. Any ideas? The only thing I can think of is then when upgrading from 10.4 to 10.5 on the master I did change the realm name, I did that following Apple's guidelines. I did have to forcebily merge the existing database with the new realm but logins and everything else seem to be working fine. Kerberos is running on the OD master and I am able to create other 10.5 replicas with no issues. Any thoughts? tom