Sort And Filter(Ascending & Descending) is not available in BTPARTNER

Hi All,

My requirement was to separate the 1st name and last name in BTPARTNER/PartnerSelList as the name was concatenated into single before.

Now I have separated the same to 1stname and last name. But the Sort Ascending/Descending is not available for the 1st name(filter is there), whereas for the last name bothe filter and sort functionality is available in WEB UI.

Please let me know how to add the sort Ascending/Descending for the 1st name in WEB UI screen.

Thanks.