I had installed the KONA LHE card in the 3rd expansion slot. In reading a few posts on the web, the 2nd slot was “preferred”. So I moved it and all worked well.
Please note that recently I had re-installed my 10.6.3 because, foolishly, I upgraded to 10.6.8 before I investigated if it was compatible with Media100. When I did the re-install I also installed the 9.0.5 AJA control panel. BEFORE the re-install, I was able to acquire without issue. It had been some time since I needed to acquire off tape. Yesterday I needed to do just that and the problem I listed appeared.
Whatever the actual reason or explanation, this worked for me. Hope this helps you if you are experiencing the same problem.