Local Activation permission for the COM Server ...

I'm connecting to the office network using VPN, and trying to run a COM+
application running on a W2K server at the office. This was working fine
until I installed SP2 for XP on my own computer.

Now when I try to run the application, I get the following error in the
event log: The application-specific permission settings do not grant Local
Activation permission for the COM Server application with CLSID ... to the
user ... This security permission can be modified using the Component
Services administrative tool.

Now when I lookup the CLSID, it belongs to a component in the COM+ package.
Looking in Component Services, under DCOM, that component doesn't show up.
However, the GUID for the COM+ proxy does, so I'm assuming that's the one I
need to worry about. However, when I look at it, it shows that I have Local
Activation permission already!

So what do I need to do to give myself permission the the COM+ package?