Hopefully you can get a better reply than this, but maybe this can point you in the right direction. That looks like an rbagent password issue to me.
When you first set up the OSD server(s), you set a username and password for the server. This can be used when logging in to the Web Interface (if you have it turned on), and also is used for communication between the rbagent and the rembo server.
I think the configurations are under \Program Files\Common Files\IBM Shared, but don’t quote me on it. Under there you should find an rbagent.conf and a rembo.conf. The rembo.conf has an encoded version of the password, which should match the password in the rbagent.conf. And you should try to make that password the same across all of your OSD servers as well, or you’ll end up in situations where you can’t use the same media across servers.
If I recall correctly, there was a problem in some version or other of the OSD installer, where if the soon-to-be-server already had an rbagent.conf (with an old password from whichever OSD server originally loaded it), the installer did not replace that rbagent.conf with a newer version made for the new server; and may keep the source server’s IP address embedded in that rbagent.conf as well which causes all sorts of weirdness (like a sync action directed at the new server, taking effect on the older server because rbagent.conf pointed at the older server)
anyway… find the rbagent.conf and rembo.conf and make sure they match up.