Senthil,
It seems that your Value List is wrong. Can you go to the value lists and select the agent and team and click on show values. It should show display all the values if not then their wrong.
Attached are two reports similar to whta your trying to do, I think, one shows an agent's membership by selecting an agent and the other shows team members by selecting teams.
When you import a report, its definition and value lists will be created.
Import them to see if you can use them as reference or production.