Righteo.
If you're still having this problem here's what you can do.
First try logging in and checking the box, but then click log out before doing anything. This will clear your cookies for the forum. You'll then need to close down your internet browser and re-open it. Log back in but check the box and that should fix the issue for most.
If it doesn't, you'll need to do this:
In Windows XP/Vista click start and then select run. Type ipconfig /flushdns
There's a space before the slash and no space after it. Hit enter/return and it should flash up a small black box, it runs something, then quickly closes. Then restart your computer and do the couple of steps above to clear your cookies.
That should fix it for everybody but if not let me know.
If you're being redirected somewhere when logging in PM me and I'll take a look into that but you shouldn't be being redirected anywhere. There's one feature that makes you read the rules once and that's a redirect thing but if you've agreed to the forum rules you never get sent there again.