Sort in Table Control on double click

in

Hi Guys
My Problem goes as follows,
I have a table control

with 3 colounms and 3 text headings. I have a
functionality where when the user selects a colounm and then
selects a

sort push button the selected col gets sorted in ascending
order.
The user wants an additional facility that when the

text header of
any of the three colunms is double clicked the selected col gets
sorted automatically.

Now

technically speaking my prb is to catch a double click event on
the text header (Its not a pushbutton) at runtime.
1. I

have assigned fcode PICK to F2 in the PF status
2. I have set the disp props of the text headers in the element list
by

checking the 'responds to double click' checkbox.

My problem is that when I click on the text header , nothing

happens
at runtime, however when I click on any field of the col selected
there is a runtime action and the prog goes

in debug mode.

The question is , how to make this double click sort on header
happen , and wether its technically

possible ?

Thanks so much for listening to my sob story :-)
Sameer