Download link dont work

Hi!

I´m using WooCommerce 1.6.6. and WordPress 3.5.1 but I cant get the download links to work for my clients.

This is how the permalinks look that the clients get:

http://mydomain.com/?email=my.name%40gmail.com&order=order_51165b7ed13fc&download_file=2842

My permalink settings in WordPress is set the postname.

I have tested setting /%category%/ but it did not work.

I have also testet both force download and redirect.

Any idea what I should test?

http://wordpress.org/extend/plugins/woocommerce/