loop on login

Hello,
I have made a test blog on my site, I loged out and loged back in.
at first glance I can see the supporter plugin suggesting an upgrade, that is good.
The problem is that the page keeps reloading on automatic every couple of seconds
it keep reloading and reloading.
Can anyone help me solve this?
I would like to go live soon and have no clue how to solve it.
my site is http://selfhelpblogs.org