DoctorBuffer on "[Plugin: NextScripts: Social Networks Auto-Poster] twitter auto-post error"

Hi, I've setup a FB and TW account. The test posts went through with no problem, but when I submit a regular post I get a twitter error:

Array ( [pgID] => [isPosted] => 0 [pDate] => 2013-12-06 11:00:10 [Error] => Resp: {"errors":[{"code":190,"message":"Status creation failed: Tweet creation failed."}]}| Error: | MSG: #Name of post/#post URL )

The FB autoposting works without problems...
Anyone knows where the problem might be?

http://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/