Skar87 on "[Plugin: BackWPup Free - WordPress Backup Plugin] Warning error !"

Before all , i need to say TYVM for this free wp plugin.

Now, this is my problem:

When i try to create a new backup for this web
( http://www.proyectosnorte.es ) with a new created job,i got this:

http://i42.tinypic.com/2qin5g6.jpg

I need some help with this.

http://wordpress.org/plugins/backwpup/