AssignPolicy

Hi

We have SEP 12.1.3 on Win 2012 and we have created two groups under "My Company"  "TEST" and "CLIENT PCs" . And we have created application and device control policy and first just want to assing to only TEST group not actual our CLIENT PCs group. But we cannot when we seleting this policy and right clicking and select assing the check box for TEST group is grey. How we can assing this policy only to this group and only I want to remove inheritance on this group

Thanks