Dear All,
I have Fedora core 3 running on my pc. now i have a problem from last two weeks. I am not able to login as root from console and Putty. Even su command also doesn,t work . I wont get any error. But in GUI mode whenever i try to login i get a message "System Administrator has disabled this account". But i am able to login from any other user name.

what could be the problem?entries in /etc/passwd are also fine.
I have LDAP, dns,apache, running on this. Please help me to solve this problem.
Thanks in advance