Fixing a Flash AS2 XML PayPal cart from FlashDen

I haven't had luck so far getting this Flash cart to work correctly. I have recently had a popup functionality added to the cart which works fine but now there is an issue with Size options not showing up in the basket. I will provide all the necessary files, XML, Flash... Attached is the XML file where products, options are listed. Also screenshot of where the size (L in this example) should be displayed. Please ask me for additional details.