Debugging ASP.Net DCOM problems

[ProfReynolds]

Network setup:
[ul]
[li]Both computers are on the same subnet within the same domain.[/li]
[li]The user on both machines are in the Administrators group for both computers[/li]
[li]The remote server is Windows 2008 64-bit, running the 64-bit version of Visual Studio Remote Debugging Monitor[/li]
[li]The local computer is Windows Vista Ultimate 64-bit, running Visual Studio 2008[/li]
[li]Net View works to and from both computers, so I think DCOM is set up correctly[/li]
[/ul]

When I start the debugging process, I get the following error message:

Unable to start debugging on the web server. The Visual Studio Remote Debugger on the target computer cannot connect back to this computer. A firewall may be preventing communication via DCOM to the local computer.

Firewalls are currently off on both the local and remote computers.

I'm at a loss. Any ideas?