I got it. Don’t remember how but I could finally solve it. Thanks!
Thanks ialexander01 but I think this is not the case. I remember I had the same problem time ago and I finally solved it, unfortunately now can’t find out now WTF i did :s
I finally tried something that worked for me!!! I found the plugin was considering all urls without www. I changed my general settings so both wordpress and blog addresses had www. After logging in again in my new www admin url, executed the pluging and now is working fine.
Good luck!
