Error 1406 – Backup Exec 2010 R3 failed to upgrade

Hello,
An error message encountered when upgrading to Backup Exec 2010 R3. How can I fix the following error message so that I may install this program properly? I have reinstalled this application but the same error message appeared. Help me to resolve this immediately.
Thanks in advance.

Fatal error:error 1406.Could not write value AdammLocal to keysoftwaresymantecbackup execServer. Verify that you have sufficient access to that key, or contact your support personnel.
