Autocreate PO form does not default rate type for supplier

Hi All,

When we are trying to auto create PO from Requisition for a particular supplier we are getting below error .After checking some metalink notes we  tried for only one PR for that Supplier while auto creating we observed that Rate type is not getting defaulted as in screenshot 2. where in for other suppliers it's getting defaulted .Plz note that Rate types are already defined still we have the issue.

Can someone tell me where does this rate type is defaulted in Auto create PO form.We are  working on R11.

For other suppliers we do get