Sorry for sending my reply twice. I did a mistake sending it with my mail client.
I examined the log-file and found out that some fonts were missing. After installing the package xfonts-100dpi everything works fine now. Sorry for making you unnecessary work. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org