Btw: I had this happen on a already installed and authorised system. It was caused by a force quit on the Digitest utility.
So keep in mind: let it run and if it does nothing, 'see' or even doesn't see the card, it's VERY important to restart your system BEFORE you launch PT. If you don't, you'll get this 'Hardware not installed' or (as described above) PT waiting forever or Digitest not longer seeing the card.
It scared me the hell out when this happend, so I thought I'd share this info with y'all.
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Arno Peeters
www.tapetv.nl