Dameware across multiple domains

I am trying to figure out what the authentication requirements are to use dameware across multiple domains.

I am in Domain1.com and I need to be able to support Domain2.com, but I have to create an account in Domain2.com to be able to support these users.

I want to be able to use my Domain1.com account to manage all users in Domain2.com. I have made my account part of Domain2.com 's built in administrators group but still no luck.

Help please!