Filter by Grid is not working on Order Status(SalesTable.SalesStatus) filed in custom form..?

Hi Friends,

I have created a new form with a single grid and SalesLine table is the main data source in that form
and I do have 3 more data sources SalesTable, CustTable and one custom table.

The Relation on SalesTable is

JoinSource : SalesLine

LinkType : InnerJoin

I have 10 fields from SalesLine and an Order status field from SalesTable (i.e. SalesTable.SalesStatus).

When I did filter by grid on SalesLine fileds its very fast but when I did the filter by grid on SalesTable field i.e. Order status its not working.

Please let me know your ideas.

Thanks In Advanceā€¦