[Koha] UDC number not shown in the holding area on the OPAC

I switched from DDC (082 tag) to UDC(080 tag) and reimported the records. When it was DDC I could edit the record item, click in the item call number and the call number would appear. Now when i edit the record it doesn't appear nor is it shown in the holdings area on the OPAC. Is there a way to get it in the table (call number section) so that the user can browse the shelf? Davian Cooper