What do you mean? What happens? Do you have a link to a live website where you can show me the problem?
When try to open link http://www.vfr-klubben.no/forum/?view=thread&id=122 nothing happends, and the loader spinner animation spins and spins and the forum thread never opens.
I am pretty sure that this is an incompatibility with one of your other WordPress plugins or your WordPress theme.
You should try to disable some of your plugins temporary to figure out which one could be responsible for it. If its not because of a plugin, it may be your template. So in this case you should contact the template-author.
