i posted the problem here - /t/16974/1
nobody seems to have replied to my post though 
i am guessing that some of the scripting has change on the iTunes store pages that is not allowing complete retrieval of data.
It may help if the original creator of the script could take a look at page elements on the store and see if some bits need changing within the script.
unfortunately Pone, who made this script originally, was last seen on the 2nd February 2015 so im guessing we may have to rely on someone else to help to sort this problem out.