Mootools.js - Accordion atStart background not displaying in ie6

[techtherapy]

Hi guys and gals,

This is a mootools js question, for any of those familiar with it. I'm using the accordion on this page:

http://admire.previsuals.com/productions/index.php/resources.php

Now when I test across browsers the only issue I have is when testing in ie6, the background color for the very first element is not displaying. The colors for the type display fine, just the bg thats the issue. I'm sure this is something ridiculous I've just overlooked. If anyone has any ideas, the help is greatly appreciated!

[acoder]

Did you check the error console? The error is:
"The specified procedure could not be found" in a pngfix file.