Ssh help

I trying to do ssh from server a to server b ( password less setup) ...it's failing with following error ...

debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /opt/oracle/.ssh/identity (0)
debug2: key: /opt/oracle/.ssh/id_rsa (0)
debug2: key: /opt/oracle/.ssh/id_dsa (4c8a40)
debug3: input_userauth_banner


debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred publickey,hostbased,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: hostbased,keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /opt/oracle/.ssh/identity
debug3: no such identity: /opt/oracle/.ssh/identity
debug1: Trying private key: /opt/oracle/.ssh/id_rsa
debug3: no such identity: /opt/oracle/.ssh/id_rsa
debug1: Offering public key: /opt/oracle/.ssh/id_dsa
debug3: send_pubkey_test
debug1: key_to_blob: packing key ssh-dss
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).

/opt/oracle, /opt/oracle/.ssh , /opt/oracle/.ssh/autorized_keys,/opt/oracle/.ssh/id_dsa, /opt/oracle/.ssh/id_ds.pub permissions are correct ( compared to other working server) ....

what am I missing ......

please help me with this ...

Thanks

How are you trying to ssh (show exact command you're using).

regular ssh command ...

$ ssh oracle@server 

Thanks