it will work eventually, you need to keep closing the popup windows, think each page at least popping up 5 times.
Use mdiaload la, much much faster, under 2 mins for one file
1. wait the countdown till 0 ,then click the lower (second) green button (not the upper one), scroll down a bit if you can't find it
2. on the new page, right click the top download button, then select 'copy link address'
3. open a new tag/page, on the top search bar, right click and select 'paste and go to....'
it will download automatically
Hope this help