web service-reset problem

Hi all,

i have a dashboard with 10 web services..

i used label based menu and reset button in first screen .

when i click reset button , reset button is reseted labels returns first label. and its ok.

but i want reset web services filters.(exmp:_MAY_Kent filter is Sheet2.A100)

if i use query with prompt , button resets prompt value.(Sheet2.A100). How can i do this with using web service ?