Server error

[Abrar Hazarika]

I have a Win2000 server where I installed lotus enterprise server.
The http webserver of the lotus server failed to bind to port 80 and so didnt start.
It said the registry key Hkey/localmachine/system/currentcontrolset/control/win32separate?? (i forgot the exact key) is set to 24 and should be made to 0. So i made it to 0.
The http webserver of lotus server started but after we uninstalled lotus enterprise server, the IIS webserver of Win2000 failed to respond.
The IIS admin says it started but any request to it comes back in the form of "500 internal server error".

The event viewer says a warning for W3SVC as "'The server failed to load application' the error was 'The specified metadata was not found'".
Can anyone please help?