Cannot see RAID 5 in windows explorer

[caseman]

Have set up RAID 5 in BIOS

have installed RAID drivers when installing windows media edition

cannot see RAID in windows

(have one main hard drive for windows and then RAID 5 set up of 3 drives....)

have been to disk management in control panel and can see unallocated RAID ....how do I
A) allocate drive number
b) make so I can see and use this RAID 5....

Thanks