If you disabled the Kona card driver, which driver did you use to capture? Did Windows still see the card with a default Windows driver?
If it looks like a Kona driver issue, then I would be on Kona’s case for a resolution.
(I don’t do SDI here, but it would be a step up from my HDV cameras.
Steve Mann
MannMade Digital Video
http://www.mmdv.com