Auth check in VA03 & VA05

Hi,

I have a query regarding authorization in one transaction in SD. We have created one custom auth object for WERKS and assigned to VA01. Here it is working fine and assigned to user for their perticular plant. This way they are restricted to their own plant and can not run the transaction for other plant.

Same way we want to do it for VA03 and VA05 so that user can run the transaction for their own plant. It seems that these transactions are not checking authorization at plant level.

Can any body help on the same pls?

Thanks in advance..

Regards,

Prashant