Possible Open Directory

I am an Open Directory novice. I have a server (10.4.11), I did not know it was an OD master. I changed the password for the user “admin” in System Preferences. Is this a problem?

The reason I ask is now I am having problems with Workgroup Manager and Server Admin. Server Admin won’t show anything (all the services show, but can’t get their status) and errors when I try to log in. In Workgroup Manager I can’t do anything with any of the users. It says when I try to change a password, for example, that I have to use and account that has an OD password to change accounts with OD passwords. Now, I am new, so I don’t know if these things were problems before I changed this password. I don’t normally work on Macs and trying to solve a couple of these problems.