Server Computer Management Tool vanished

Can anyone help me to re install the Computer Management Tool in Win2K server? I (foolishly) tried to install a Dell RAID management application which warned me that it would disable the native Disk management Tool but would restore this if I subsiquently uninstalled the Dell utility. I didn’t like the Dell tool but when I uninstalled it found that the native CM tool was completely blank when started. Any ideas on how to get it back?
Thanks
Peter