swf file not responding properly

I have a swf file that is a scrollbar inserted on a page. The scroll was initially working perfectly - the page opened up and the scroll was active. I've since redesigned the page and am now using tables instead of layers. Now that the scrollbar has been inserted in the table, it doesn't work right. Upon opening the page the scroll moves a little (it's supposed to react to the mouse) and then freezes. You have to click on it to activate it now.

Does anyone know why this is happening?