I\'m trying to Remote Debugging a Windows Forms Application (C#), but i\'m always getting this error:
Unable to connect to the Microsoft Visual Studi
Gregg Miskely has a blog post on why the service account needs to have admin privileges (when set up that way). One of the points is that the user account, in your case the user on the Test machine, must have privileges for connecting back to the other computer. It sounds like you are hitting a case where the account mydomain\user1 has insufficient privileges to connect to your development computer.
If that doesn't help perusing Gregg's blog posts, sending him mail could help.