Security issue in cognos transformer

[cognos05]

We are in cognos 10.2.1

Have a cognos transformer cube build and the cube is updated daily morning.

I have a security group for a specific customer and restricted few members for that customer to be shown.

The issue is that the data is present in the cube when i login as admin ,but when i login as that customer i dont see data for specific intersections.

I have checked the security at lowest level for all possible dimensions for that customers custom view and all members are included , but not sure why the data is still nto showing for that customer .

Is there any proprties that locks the security file or overwrites it , how can i trouble shoot .

Thanks,