WordPress Gallery Slideshow problem in I.E.

i installed the wordpress gallery slideshow into the middle of homepage (https://www.goldcoastchamber.com/wordpress/). it works great in firefox, but for some reason in I.E., instead of the slideshow, the pics that are attached to the page, that should be appearing in slideshow format, just sit next to one another.

any idea how to fix? please advise. thanks!

here’s the code for the slideshow plugin (i.e. slideshow.php file):

[huge chunk of code moderated - please use a pastebin or link to file]