parham, I think you are missing that you need to click on the orange button in the upper right corner after 7 seconds that says "Skip this Ad". Works beautiful for me. Very fast download! Here are the detailed instructions I've seen posted somewhere else:

1. Copy and paste one of the links into the URL command line of your browser (suggest to open a new window first)

2. Wait 7 seconds for the countdown timer in the upper right corner

3. Click the orange button in the top right corner that says "Skip this ad". The pdf should appear in your window.