4
Sorry, cant access your forum without login, I dont know your language..:)
Did you do an update of the module in system admin/modules?
Edit: if you go to system admin/preferences/general settings and switch on phpdebug, and then go to the forum/page with the problem and post the results that would help
See this topic here
https://xoops.org/modules/newbb/viewtopic.php?topic_id=16941&forum=1#forumpost71288
Which leads to another hack here for 2.0.6
http://www.regenerateweb.net/portal/modules/mydownloads/