JScrollPane not working…

Hi Friends,
I was trying to put my panel which is extends from panel into object of scrollpane, during the process i was not getting any error, but i was not getting what i was expected, that is my image
( created using fillRect was to learge to view in single view)was not scrolling at all.
What could be possible reason behind this?
Below is some snippets of the code.

I created object of my class which is extends from Panel
then i created object of JScrollPane to this constructor I passed object of mypanels object.
add then add this object of JScrollPane to my frame object in the constructor of myframe.