Sliding Navigation Component

hi, im having another problem with this component. i have used it on two areas of my site. one for artwork and another for design. my problem is this: if a user clicks on artwork, views the content and then clicks on design, the component fails to move to the correct positions. flash is unloading the artwork swf and loading the design swf in its place. ive also tried loading to different levels instead of the same one with no luck. the only way to fix the problem, that i can see, is to refresh the page. which is pretty lame if you ask me. anyone know how to fix this problem? you can see the errors for yourself at
http://www.humboldt.edu/~mds40

any help would be great!
thank you
matt