advanced poll - was working then suddenly not?

Hi,
I am using advanced poll (text file) and had the code working perfectly for a few days then - all of a sudden with no changes to the page - it stopped working.

Basicly, if you view the source on the .php page now all you can see is the html info that appears before the following..
It no longer display the code itself or any of the html after that code?

Weird?? Anyone have any suggestions??