http://www.tefl.net/esl-lesson-plans/worksheets-topic.htm

I'm trying to download the pdfs from this teaching website.

It looks simple but I've spent so long working out different scan rules I
might as well've downloaded them manually! 

I've set <http://www.tefl.net/esl-lesson-plans/worksheets-topic.htm> as the page
to download in the Web Addresses (URL) box

Then the scan rules I use are:

-*
+www.tefl.net/esl-lesson-plans/*.htm
+www.tefl.net/esl-lesson-plans/*.pdf
+www.tefl.net/esl-lesson-plans/worksheets*.htm
+*.pdf
+*.png +*.gif +*.jpg +*.css +*.js -ad.doubleclick.net/*
-mime:application/foobar

And I've set no robot rules! But the downloads come back empty! What am I
overlooking?? Thanks