add icons to wp responsive theme submenu

I am using a child theme of the WP Responsive theme and am trying to add icons
next to the items/words on the submenu. I have 2 menu items now and will add more.
I can't get the icons to appear that I've created. FYI the urls for the images
are: (this is for the SayIt icon) (this is for the PlayIt icon)

I've tried numerous ways and can't get it to work. Would you please help. My site
is under development, but I have removed the password restriction so you can take a look
at it -