Filtering in SSRS Visual Studio works, but not when uploaded to CRM

I have an SSRS report that is filtering correctly in VS. Query returns correctly, and the Preview runs correctly. When I upload to CRM, it no longer filters properly.

SELECT
CRMAF_FilteredRVA_purchaseorder.rva_customerjob AS JobNo,
CRMAF_FilteredRVA_purchaseorder.rva_jobrevenue AS JobRevenue,
CRMAF_FilteredRVA_workorder.rva_purchaseorderidname AS PurchaseOrder,
CRMAF_FilteredRVA_purchaseorder.rva_poid AS PO,
CRMAF_Filteredrva_workorder.rva_buildquantity AS JobQuantity,
CRMAF_FilteredRVA_workorder.rva_datefulfilled AS Date,
CRMAF_FilteredRVA_workorder.rva_workordernumber AS WO

FROM     Filteredrva_purchaseorder AS CRMAF_FilteredRVA_purchaseorder
INNER JOIN Filteredrva_workorder AS CRMAF_FilteredRVA_workorder ON CRMAF_FilteredRVA_purchaseorder.rva_purchaseorderid = CRMAF_FilteredRVA_workorder.rva_purchaseorderid

WHERE
CRMAF_FilteredRVA_purchaseorder.rva_poid = @POID

Any help is greatly appreciated.

Ken Compter