oops forgot mention thats on my site not this one!

Tried moving it around and it didn't make much difference until I moved it to the top of ther plugins list whereby the whole site went WSOD

Create a file named "disabled" in your mod folder. This will temporarily disable all plugins. It will allow you to disable and remove the forum plugin and at least will make your site working again.

Thanks iionly - Played merry hell with my theme for some reason though!

After some shifting around of it in the mod list all that happens now is that clicking on the Add Forum button just results in a white page not the WSOD for the entire site.