Issues with Manager Accessing Employees

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I am implementing Taleo Perform and have created a number of dummy test managers and employees.  When I log in as the Test Manager and try to access one of my employees, I get the following message:  Access Denied     You do not have sufficient access rights to perform part or all of this action.

When I log in as another test manager, I can access my employees.  When I check the User settings for both, they both have the same settings.

Can anyone tell me why this might be?