how to use UpdateMessageTextL

hello,

how to use the UpdateMessageTextL method of CCknCancelDialog class?

I've tried something like:

CCknCancelDialog* iCancelNote;
........................

iCancelNote = CCknCancelDialog::NewL(&iCancelNote, this,_L("Title"), _L("please wait...."));
....................
iCancelNote->RunDlgLD();
...............
iCancelNote->UpdateMessageTextL(_L("test"));


but it seems it doesn't work.

thanks