Focus lost when setting AW.UI.Input as cell template

If I set a AW.UI.Input as Cell template in a Grid with :

obj.setCellTemplate(new AW.UI.Input, 1, 1);

The input shows OK, but each character typed in causes a focus lost and the user has to click the input field with mouse again. Also, tab index dose not work in this case.

me too

obj.setCellEditable(false);
var lastcol="";
var lastrow="";
var MyInput = new AW.UI.Input;
var defaultcelltemplate = obj.getCellTemplate(0,0);

obj.onCellClicked = function(event, col, row){

obj.setCellTemplate(defaultcelltemplate, lastcol, lastrow);
obj.getCellTemplate(lastcol, lastrow).refresh();
obj.setCellTemplate(MyInput , col, row);
obj.getCellTemplate(col, row).refresh();

var celltext = MyInput.element().getElementsByTagName("input")[0];
celltext.focus();
if (celltext.createTextRange) {
var r = celltext.createTextRange();
r.moveStart('character', celltext.value.length);
r.collapse();
r.select();
}
lastcol = col;
lastrow = row;
}

// write grid html to the page
document.write(obj);

up is my code.
I want to edit cell on click,not on dbclick.
but,I get this error.
Who can help me?!