authorization object K_CSKS

HI,

I want to restrict the users to their cost centers I have used authorization object K_CSKS.

In the profile i have allowed only AD0001-AD0050 range.

But when i used the code

authority-check object 'K_CSKS'

id 'KOKRS' DUMMY

id 'KOSTL' field 'AD5000'

id 'ACTVT' field '01'.

It always give sy-subrc equal to 0 to all cost centers.

How to restrict users to their given range in their profile.

Thanks

Wasim Ahmed