Why am I getting access denied? (the easy answer)

Drupal tech support from square one:

ben, as i said the link below says 'denied access' and i just tried to open content page to post new issue, as i've been doing successfully, but now it says "no content types available" so i'm STUCK!

why and what next?

Log in:

http://example.com/user

thanks for the speedy reply ben -- but why do i suddenly need to log in
-- how can i always get there automatically?

You've just been logged in since whenever you logged in last time. But every once in a while you will get logged out, and have to log in again. Mostly its the site's making sure you're you.

ben