trouble detecting drive in win2k

i just bought a new 40gb western digital drive (identical to the one i have) to use as a slave drive. i installed it correctly (everything hooked up the way it should be), but i can't see the drive in explorer.

when i look in the control panel, under my device manager, it shows up, but no letter is assigned to it--it won't let me assign one.

does anyone know how i can format this drive?

thanks