Not Staying Logged In

Hi,

Whenever I go to log into the admin panel, I immediately get bumped. It almost looks like it’s not storing a cookie. I checked, and the only cookies being stored are phpsessid, __utma __utmb __utmc and __utmz.

This server is located behind NAT. Version number 2.11.0.11

Any assistance would be appreciated.

Can anyone help with this matter?