Multiple RDX drives

Hi,

We have switched to using RDX drives with backup exec 2012, this works great, now we have another RDX drive which we installed on the server, we can see the drive in device manager, in my computer but it doesn't show in BE2012. Weve tried restarting the BE services and also rebooted the whole server, but still the device doesnt show - When I say show I mean the option to add another RDX drive is greyed out when I try to add it.

Any ideas?

Regards,

Mick.