BE2012 Can't add Robotic Library Support option
So I've been having trouble with my tape library (I only have one). A faulty tape kept getting stuck in the drive, rendering the library inoperable from BE. I finally shutdown the BE server and the tape library and then re-started both. Unfortunately the library was then offline.
I was able to do part one - uninstall the Virtual Tape Library Support and Robotic Library Support options. Rebooted the server on completion.
Now I can't enable Robotic Library Support. I follow the procedure, it looks like the install is going to work and then at the point where the progress bar says 'Copying New files' a prompt comes up saying "Install Disk:" (it doesn't say which disk, but I assume it means the BE2012 install DVD). The install disk is in the server optical drive and in explorer I can browse it fine and even run browser.exe, but I cannot get the Licence reinstall procedure to recognise it.
I'm stuck without a usable tape library.
Any advice would be greatly appreciated. Thanks