Everytime I use forums.sonicdash.net, it logs me out when I go to another url and go back to the forums.

Any-way to cure this?

When it was on www.sonicdash.net/forum it worked fine without logging me out automatically.

Any help on this?

The cookie is set for the host: forum.sonicdash.net but after clicking a link it goes to sonicdash.com/forum, so the cookie isnt valid any more.