PLEASE
DO NOT USE ALL CAPITAL LETTERS!!
IT IS VERY DIFFICULT TO READ.
IT MAKES IT SEEM LIKE YOU ARE SHOUTING AT US!!
Did you use a simple Cat5 cable between your computer and the ATEM, or did you plug the computer or the ATEM into the wall (the computer network in the studio).
Your symptoms sound like you plugged your computer into a network at the studio and it uses DHCP which automatically reconfigures your network. We will need much better details about exactly how you are doing things if you hope for any practical help from us.
http://en.wikipedia.org/wiki/DHCP
http://gospelliving.blogspot.com/2008/10/quick-reminder-on-netiquette-all-c...
