[otrs] Forwarding problem / base64

I want to forward a mail and get: Software error: can't have encoding base64 for message type message/delivery-status! at /data2/var/www/otrs/bin/cgi-bin/../../Kernel/System/Ticket/Article.pm line 1265 For help, please send mail to the webmaster (webmaster@lbs.bw.schule.de), giving this error message and the time and date of the error. What is wrong here? I urgently need this function, otherwise tickets can not be closed. mfg ar -- Online-Kurs "Computernetzwerke": http://www.OntoLearn.de/moodle