Hello Cindy,
Under Customize > Tab Groups/Roles you specify which Tabs should be accessible to the corresponding Roles. Let's take the Customer Center Tab for example, if you remove the Customer List screen from that Tab, then point Admin and the New Role to have access to the Customer Center tab, now both would not see the Customer list screen since it has been removed.
In your case, did you create a new Tab and place the screens that should be visible to the New Role? If you didn't then this may be the reason you got the results you did. Once you have your new Tab, you then edit the Role to have access to it. Let me know if this works.