[Users] Can't login with the user 'admin'

After upgrading ovirt-engine (new version: ovirt-engine-3.1.0-3.1345126685.git7649eed.fc17), I can't login with the user 'admin'. Here's my upgrade process: yum remove ovirt-engine yum install ovirt-engine engine-setup and type the same password for 'admin' as before. The setup script finished successfully. But I can't login with 'admin' user. I tried to run engine-setup again, but it didn't help. I also tried to change password with engine-config: # engine-config -g AdminPassword Failed to decrypt the current value # engine-config -s AdminPassword=xxxxxxxx 'xxxxxxxx' is not a valid value for type Password. It always complains it's not a valid value whatever I input. Is there anyone hit problem before? And any idea about how to resolve it? Thanks