Aggregators with Captcha don't work

[Marinus]

I have problems with the aggregators that requiring captcha's, when i enable one and update the site, this one is saved. When i then enable another one and update, the first one is again disabled.
Further when i select all and do the enable checked it wont accept this, anyone who could advise e please to fix this problem.

[Mike Taylor]

You pick one (and only one) at a time to submit to it... If you don't get acceptable results, then you pick another...