[SOLVED] Core Module Forum - Invalid argument supplied for foreach() . . . You are not allowed to post new content in the forum

Dear All

I have a problem with core module Forums.

I can create a container ok but when I click on the link with the new container name under Home › Administer › Content management I get:

container test 01 xxxtps
warning: Invalid argument supplied for foreach() in /var/www/www.netmaster.dk/htdocs/modules/forum/forum.module on line 670.
You are not allowed to post new content in the forum

I am on Drupal 6.14 and I executed this php:

variable_del('forum_nav_vocabulary');

I got the php from http://drupal.org/node/90214

Now I seem to be in bad shape.

What is the best way to move forward?

Currently I have no forum, comments or taxonomy data.

Thanks

Thomas S