Help with action script needed!

Hi!.. a million thanx to whoever can help me out…this site is half way done but I seem to be having some problems, if I go to transport and keep interchanging between the two options the buttons for scrolling or forward keep freezing up after some time…not immediately, I am going nuts trying to solve this can someone tell me where I am going wrong, all the files source, text and html are (in two zipped folders)