Advanced Poll problem

I'm having a problem with Advanced Poll, I'm not sure what's wrong. I have a website with a lot of pages, I use php includes, so every page ends with php. In the footer file, I have the poll, so that it is viewed on every single page. The problem is I have just put a lot of the pages in sub-folders and the poll isn't working on those pages. It appears on those pages, but acts as if I haven't voted, even though I know I have and when I click to view results, I get a page not found error.

So my site is kind of like this:

footer.php - poll code is in this file and rest of files have php include to include the footer.php

index.php - poll appears and works fine
links.php - poll appears and works fine
^^ all the pages in levels like those, the poll works fine

But then I have pages that look like this:

xxx.net/screencaps/xxx/xxx.php - poll appears but acts as if I haven't voted and get a page not found error when clicking on view results.

Does anyone have any advice as to what may be wrong?