User problems

Hi, everyone.

I am having a problem with a site that I set up a short while ago, http://www.make-a-statement.net. Other than having edited the blog module to make them private blogs, it's a standard 4.7 installation. What's happening is that the site is rejecting all non-admin logins, period, even when valid, and it's not allowing the admin user to gain access to the administrative functions. This is my livelihood, so if someone can help me out ASAP, I'd be very, very appreciative.

Dheeraj
http://www.dheerajchand.com
dheeraj[AT]dheerajchand.com