For some reason that I'd like to see explained myself using a posting key is not enough. (talking about the new site)
I'm not the slightest worried about it though, since I don't count my money at the table and also because it's the Busy team after all.
I tried all of mine and none worked. I don't use busy anyway- but my keys work fine on Steemit and that's what counts.
Do you use any other Steem based apps? Keys should work everywhere, unless there is a bug or if you're not yet approved for the limited beta.
If you're talking about the current busy.org, it only requires the private posting key as far as I know. The new site requires the private active key.
I've tried them all. This happened before. I had to do a recovery on my account and the same thing happened before the recovery and after. Maybe they just don't like me!