Problem fixed. It was not related to ubbthreads. The settings for varfilter (a php modul) was to small. After several tryouts and Rick help we found the propper settings.

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen