Hi Sreedev,
It is likely you have two IDs (S-ID and a P-ID) associated with the same email address.
If you are aware of your P-ID (try to log on cloud directly and check your settings page, you should be able to find the ID there) then you can try logging on cloud from desktop using your P-ID and password.
If you want to stay with your S-ID as the primary account, let us know we can fix the ID and email association.
Thanks,
Jay