Apply my image in panelMenuGroup

[6sic6]

Hi all
I'm using panelMenu and something like
iconExpanded="/img/icon_arrow_up.png"
to apply my arrow image
it seems it doesn't find the image
are there other things toDo to setup this funcion?
thanks

[ilya_shaikovsky]

check please our livedemo page.
I've made small correction in the example you will see adding:

iconExpandedTopGroup="/images/ico_ModalPanel.gif"
iconCollapsedTopGroup="/images/ico_ModalPanel.gif"

And my custom icons shown. So works fine for me.

[6sic6]

thanks ilya ! ;)