Prediction scores always the same

Hi, Im using recommender api with browsing history. I don't get errors so I guess it should be working fine but I think I'm missing something.

I've been clicking around on different nodes with different users but I always get the same prediction score for every node.

http://i.imgur.com/5MlD58b.png

These are my scan logs

http://i.imgur.com/XHtBUvi.png

Could anyone help me out? Do I need to configure something else?

Thanks