Question:

I had a member contact me saying that after they log in they can't go anywhere else. Every time they click on a private menu link, they are taken back to the log in page. How do I help them fix it?

Generally it's an issue with the cookie in the browser being corrupted or not accepted by the browser. I've only seen this happen with the internet explorer browser. This link shows how to fix it in IE:

Login Problems Fix

If it is happening on an iPhone best thing to try would be to clear the browser cookies on the iPhone, and make sure the security settings are not blocking the cookies. On the phone go to the Settings icon, then choose Safari from the programs list. On the Safari settings page, click the Clear Cookies and Data button. Also make sure the accept cookies settings is set to "from visited" and that private browsing is off.