Cannot add specific directory to be indexed

Hi,

I have been trying to add my Documents folder to be indexed by Windows Search but there seems to be no way to add the folder. I clicked Show All Locations on the Indexed Locations window but the only choices available under Users are Default and Public. There is another folder named 'ljfong' (my windows login name) under Users, but it is not visible from the tree view folder choices. Does anyone know how to make the folder included in the set of possible choices of locations to be indexed?

Thanks,

Hong