Trouble posting.

[interested_learner]

I received the following message when trying to post to Calc and beyond in the homework section:

The page your looking for can't be found.
Please go back to the homepage: http://www.physicsforums.com/
Physics Forums

Other people seem to be posting. Am I doing something wrong

[VietDao29]

You seemed to have been automatically signed out. This happens if you take a long time for posting. So to avoid this, simply check the Remember Me checkbox, when you sign in. And hopefully, the message won't appear again. :)

[interested_learner]

I checked the remember me box and it is still not working. I also was real quick to post. Any other suggestions? I can post replies ok, I just can't seem to start a new thread and I have a question that I would very much like to post.