Problem on Accessing NCI Eucalyptus Private Cloud.

I am trying to runn a instance of NCI EUcalyptus private cloud but when i am trying to do that, it is asking for a pasword. I tryed many but did't workd ( i added my private key to ssh). Please provide information to slove this isuue. Here below i am mentioning the out which i got.

jaideep@ubuntu:~/Downloads$ ssh -i /home/jaideep/Downloads/jaideep.pem ubuntu@193.1.202.10
ubuntu@193.1.202.10's password: 
Permission denied, please try again.
ubuntu@193.1.202.10's password: 
Connection closed by 193.1.202.10
jaideep@ubuntu:~/Downloads$ ssh -i /home/jaideep/Downloads/jaideep.pem ubuntu@193.1.202.10
ubuntu@193.1.202.10's password: 
Permission denied, please try again.
ubuntu@193.1.202.10's password: 
Permission denied, please try again.
ubuntu@193.1.202.10's password: 
Permission denied (publickey,password).