handler event not firing for the first time but fires when second letter is pressed

[singla989]

When I use jquery-1.8.3.js it works fine. But, when I use jquery-1.9.1.min.js or jquery-1.9.0.js, even is fired when second letter is pressed.

Code used to fire ProcessRequest event is:

$(document).ready(function () {
    $("#<%=txtSearchText.ClientID%>").autocomplete("Search_CS.ashx", {

    });
});