Currently Being ModeratedSep 2, 2012 12:31 PM (in response to kt4ever)
Actually, every Mac is a fully capable server, you just have to enable server tasks.
For some reason, your computer is trying to connect to the Mac Pro, probably for file sharing. Since the Mac Pro is not available, you get that message. Try looking in System Preferences -> Users & Groups -> Login Items. Is the Mac Pro on that list? If so, remove it. If not, you've got some other process that you have configured to connect to that machine, perhaps Time Machine, that is unable to do so.
Currently Being ModeratedSep 2, 2012 12:49 PM (in response to thomas_r.)
Only thing checked in login items is iTunes helper and antivirus.
Currently Being ModeratedSep 2, 2012 4:30 PM (in response to kt4ever)
What about Time Machine? Were you backing up to a hard drive attached to that Mac Pro at some point?
Currently Being ModeratedOct 17, 2012 3:10 PM (in response to kt4ever)
I had the same general problem: every few minutes I would get the message "There was a problem connecting to the server 'myserver'. Contact your system administrator for more information."
The problem went away for me when I reset the sync server.
I hope this works for others as well.