password recovery!!!!!

Ηi. I am running suse linux 7.1 with sendmail, dns, mysql ..! I have a big problem. Yesterday I reboot my machine but when is starts it tells me to do fschk.ext2 manually. I did it. I reboot the machine, all the services went up but I can't login. The mail also prompts for incorrect password!!!! It looks like the /etc/passwd file corrupts!!!!! Is there a way to recover it. Please help. Is urgent!!!!