Civil 3D is stalling when more than one person is running the program. The toolspace blinks as if it is refreshing every few seconds, the cursor stalls, and commands are not executed. We are running locally installed software with a network license.

This problem only occurs when more than one of us opens the program, even before we open a drawing. I tried installing SP2 and the associated Hotfix, but stalling still occurs.

Has anyone else run into this problem and how did you fix it?