I did one with Timekeeper a month ago (no T&B). First, rebuild all your timekeeper files prior to the upgrade. My customer's took aver 2 hours and the upgrade would not work until I did this. Second, you know the notes that we don't always read because we've done it so much. Well, read their notes--they have additional info that we have to follow specifically for this upgrade. I think it has to do with uninstalling the HT keys and installing the SWK keys. Lastly, you might want to check with Peggy Beaver at SWK, who told me everyone who does TK upgrades struggles. If I can find more notes, I'll send them on.