[jQuery] Possible name space issue?

[Ashish]

All my code is in name space Ex where  Ex = YAHOO.namespace('pmc');

now inside this code, I have some jquery
Ex.myProgressFormatter = function(elCell, oRecord, oColumn, oData) {
    var iterid = oRecord.getData("id");
     var elementid = "pb" + iterid;
    .....
jQuery("#" +elementid).progressbar().progressbar("progress", status);
jQuery("#" +elementid).text("yui jquery worked");
.......

}

jQuery lines are executing but not doing anything at all. No text is
added. no progress bar is added.

is it a namespace issue? how can i fix it?