Validation based on three dimensions

Hello,

I am working on BPC 10.1 NW and BW 7.4

I am trying to setup Manul validations against a combination of three dimensions

Dim1: Personal Area

Dim2: Personal Sub Area

Dim3: Organizational Unit

i have defined 3 rules where in

Rule1: Personal area = 1010

           Personal Subarea = 10011010,10021010,.......

           Org Unit = 50000165,50000169,........

Rule2 Personal area = 1010

          Personal Subarea = 10011010

          Orgunit = 50000169

Rule 3 Personal Area = 1010

           Personal Subarea = 10021010

           Orgunit = 50000165

based on the above set up i am getting error saying orgunit is not assigned in rule 2 when trying to enter data in combination of rule 3. How to set up validation based on above three dimension combination manually?

Please find set up and error screenshots as attachements

Thanks in advance.

Praveen