www.stumbleupon.com/favorites/reviews not found even i have stumbleupon account

Hi guys, when i did this below mentioned job, i have a problem, there is no favorites/reviews/ found, so i could not complete this job, if any have done, please share how to do this. Thanks. the Problem is as below :
1. Go to http://cheetuh.com/b/5dQkVVH-902afb9a
to check what URL you will need to bookmark

2. Login to your Stumbleupon account
3. Bookmark the URL from http://cheetuh.com/b/5dQkVVH-902afb9a by clicking "Add site" on http://www.stumbleupon.com/favorites/reviews/ and entering the URL url from http://cheetuh.com/b/5dQkVVH-902afb9a into both "URL" and "Review" inputs

4. Submit the address of this new bookmark at http://cheetuh.com/b/5dQkVVH-902afb9a and note the confirmation given upon
doing that

Its the most easiest job ever given in Mw , how come you couldn't do it properly.