Error: cannot call methods on puidropdown prior to initialization; attempted to call method 'option'

[hybitu]

I got this error, the first combobox, works perfectly but the second with the same code but different id, does not. Please could anyone give me any idea.

A B

$.ajax({
type: "GET",
url: "controller/listA",
success: function(data, textStatus, jqXHR) {
$("#a").puidropdown("option", "data", eval("(" + data + ")"));

                },
                error: function(jqXHR, textStatus, errorThrown) {
                    addPanMsgFrmTipoRecargoDescuento("error", {summary: "error:", detail: "xhr:  " + jqXHR + ", textStatus: " + textStatus + ", errorThrown: " + errorThrown});
                }

});

$.ajax({
type: "GET",
url: "controller/listB",
success: function(data, textStatus, jqXHR) {
//alert(data);
$("#B").puidropdown("option", "data", eval("(" + data + ")"));
},
error: function(jqXHR, textStatus, errorThrown) {
addPanMsgFrmTipoRecargoDescuento("error", {summary: "error:", detail: "xhr: " + jqXHR + ", textStatus: " + textStatus + ", errorThrown: " + errorThrown});
}
});