MyBB Community Forums

Hi,
Wonder if anyone can help, new members that register on my site cannot see the full board, when they go to the forum page they see a breif overview of the board but not all the catagories and also when they login they get taken back to the same page and are not looged in at all. Is there a reason for this or have i set something up wrong?
Any help would be appreciated.

First one, catagory listing on the front page is not included in myBB till Gold(?). You will have to add them manually using XHTML.

The second one sounds like a cookie domain and path error. What have you got set for them??