printer driver deletion in vista

In XP, I could delete a printer driver in "Printer Fax -> Server
Setting -> Driver Tab".

In Vista, I see the identical driver tab in serversetting, and there
are all my drivers listed shown. But when I click on a driver I want
to delete, the remove button doesn't activate. Only (E) button is
active.

I tried from a normal user and admin user (which I first created when
vista first installed).

How can I delete the drivers?

TIA.

Open the Server Properties As Administrator

then one can delete drivers.