SAP Design Studio 1.2 sp01 Filters logic is required for drop down list component

Hi all,

               I am working with sap ds 1.2 sp01,In dropdown list, assume it has X,Y,Z. So defaulty it shows first  "X' value in Dropdown list , but in Croos tab from DS_1, it is not related to "x" value, it shows overall Values In formation,but i want "x" value Information.. How can i get in DS?, PLEASE HELP ME OUT.

.below logics i applied in drop down list component.

             DS_1.setFilter("Dimension Name", DROPDOWN_1.getSelectedValue());

and below logic in Application on Startup event:

DROPDOWN_1.setItems(DS_1.getMemberList("dimension name", MemberPresentation.INTERNAL_KEY, MemberDisplay.KEY, 10));

Thanks

Thiru.G