Thanks Ray.
That makes sense - I cant see anywhere else that has that code that needed to be updated so i will give that a try.
On another note - for your info, I found that i could only test 1 purchase through sandbox on 1 credit card. every other time I tried, it would reject my credit card unless I quit the browser, relaunch, clear history and cache and try again - worked only sometimes to allow me to test again. frustrating but i am sure this is a sandbox issue too.