ADMIN Rights

I maintain a small W2k network and I constantly use Terminal Services at work. There is another user who has ADMIN rights for he also maintains this network. The problem is he is like a child and constantly kicks me out of Terminal Services and blocks access form me, and I ahve no way to get through. Then he will be out of the day and I am stuck. Like a child I say.
How do I prevent myself from being kicked off of Terminal Services with the exception of a reboot of course)? How is he able to block me out? How do I block him if he is messing around wih something?
He has to have ADMIN rights but how is he able to do this if I have these same rights?
Please assist.