Degraded RAID Configuration Menu selection greyed out

windows xp sp3, my book mirror edtion (2 x 1TB)

Lifeguard indicated degraded raid 1 -

Raid manager requested I replace a drive inorder to correct the issue.

I replaced the drive., lifeguard indicated degraded raid 1

using raid-manager, select the drive , right click.

The “reconfigure raid” menu item is greyed out.

I would like to break the raid 0, reformat the drives and re-establish the raid 0 but the selection to do this is always greayed out.