Menu Entries Icons - Icon Path?

We were attempting to add icons to our menu entries; however, we have not been successful. We are using Rhythmyx 6.7 and following the instructions found in “Customizing Active Assembly & Content Explorer Interfaces” on page 47. It states that by defining the Icon Path, the icon should show accordingly as the menu icon for that item. We have set the exact path as in the manual, confirmed the existence of the image file, and restarted the application for good measure with no results.

Has anyone been successful with the implementation of icons in the menu entries?