Error: Unable to initiate DCOM communication
A DCOM error occurred when the local machine tried to communicate with the remote machine. This is caused by a firewall on the remote server or broken Windows authentication on the remote machine.
To correct this error
If the remote machine is running Windows XP Service Pack 2 and the Windows Firewall is enabled, see How to: Set Up Remote Debugging for instructions on how to configure the firewall for local debugging.
To restore Windows authentication, try rebooting both machines. Check event logs on local and remote machines for Kerberos errors and check with domain administrators for known problems.