SimpleModal breaks ASP.Net Postbacks

btn.OnClientClick = string.Format("{0}; dlg.close();",
                        ClientScript.GetPostBackEventReference(btn, null));

private void CloseDialog()
{
    string script = string.Format(@"closeDialog()");
    ScriptManager.RegisterClientScriptBlock(this, typeof(Page), UniqueID, script, true);
}

function closeDialog() {
        $.modal.close();
    }

function modalShow(dialog) {

    // if the user clicks "Save" in dialog
    dialog.data.find('#ButtonSave').click(function(ev) {
        ev.preventDefault();

        //Perfom validation

        // close the dialog
        $.modal.close();

        //Fire the click event of the hidden button to cause a postback
        dialog.data.find('#ButtonSaveTask').click();
    });

    dialog.data.find("#ButtonCancel").click(function(ev) {
        ev.preventDefault();
        $.modal.close();
    });
}

$('#myJQselector').modal({onClose: mynewClose});

function myNewClose (dialog)

{

dialog.close();





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{appendTo:'form'}

{appendTo:'form'}

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{appendTo:'form'}