[jQuery] disable or replace plugin

[Lampa]

Hello,

i've own plugin.

My code:
$('#jXInput').tellMe('rpc.php', {noCache: true, param:
'rType=zum&rGroup=1', dataProcessing: function(d, sD) {
        $('#jXInput').parents('tr').eq(0).children().each(fillIt);
        function fillIt(index, el) {
                if (!index)
                        $(el).children().val(d[1]);
                else if (index == 3)
                        $(el).text(d[2]);
        }
}});

sometimes i need send param 'rType=zum&rGroup=2', but plugin is
already hooked on #jXInput, when i bind it second time (with different
arguments), plugin is called twice (one with old param and second with
new param).

I need how to disable plugin on #jXInput or how to change parameters
in calling this plugin.

Thank you for your help and advices.

Lampa