Problems to log into my application as an Admin

Hi to all, I designed an application for managing mailing lists, but something really strange happened, I logged in as an admin only once and then it only allows me to log as a regular user, if I try to use the admin user it keeps returning the error messages. I used sessions to distinguish between regular and administrators, but because I'm not hosting in house, my host provider didn't bring any logs so I don't know where the error might be. Any Ideas ? Rick Fitzgerald Off Price Closeouts 1700 W 8 Ave Miami, FL 33010 (305) 888 2555 FAX (305) 884 1761