I don't know if this is a problem that can be solved, but Mocpages keeps on logging me out at random times. For example: I was logged in earlier, and I clicked to go on my group 'Lamborghini Onwers club' (it doesn't just happen to me on this group) and I noticed it asked me if I wanted to join the group, and it had logged me out... I was logged in just one click before though...
This has been happening for a while now, and it is starting to get a bit annoying.
Unfortunately, it doesn't redirect one to the other, and cookies (which are used to track your logged in session) can't exist on both types of address at the same time.
Thus, if you bookmark a mocpages page *without* the www or otherwise use such an address as a link (as you have done on your home page) and subsequently log in to mocpages *with* the www and then click on the non-www link, it will believe you are not logged in.
Best to ensure you use www everywhere.
Unfortunately you can't control what form of address other people use when they are logged in and looking at your page, so if you link with the www and another user logs in without the www he will also be told he is not logged in when he visits your link. Ultimately the problem would only ever fully go away for everyone if this site implements a redirect properly.