Hello Ulli,
I'm having a bit of trouble with the bit.ly shortener service & ATNG pro - I've set up both Twitter & FB, & set up the bit.ly service (BTW I've used bit.ly before, - manually - on our Twitter account & had no problems, so I know it works).
I am getting no error messages from AutoTweet either(I did with the first attempt as I put in wrong username initially....

) and the articles are posted to Twitter & FB however the url posted to Twitter is not shortened at all, and the url posted to FB is shortened but it doesn't work properly (it just leads to a white page when clicked....).
I've checked on bit.ly & the new articles are not listed, however it is showing 2 new clicks for today (which could be me or someone else clicking on the new articles posted via AutoTweet perhaps - as I haven't posted anything else for over a week).
I need to use bit.ly as it is excellent for tracking the clicks etc.
Any advice?
Regards, Karen