GraphicsLayer added not not displayed

[ShaningYu]

Based Zoom to Found Features http://help.arcgis.com/en/webapi/flex/samples/index.html#/Zoom_to_found_features/01nq0000005n000000/, I created a widget.  It works well except for adding the graphicsLayer on the map.  I run the debug.  From the Expressions window, it shows the values of its graphicsLayer and graphicProvider.  But  the graphicsLyaer does not display. 
I wish someone can help for his/her experience.  Thanks.

[RobertScheitlin__GISP]

Shaning,

   If you mean widget as in Flex Viewer than you are still posting to the wrong forum. Or maybe you are using the term widget loosely. Let me know so I know how to procede in answering you.

[ShaningYu · Accepted solution]

Solved with
map.addLayer(myGraphicsLayer);