css not working , redirect_to? error in wp_login

Hi,
since a time, my weblog is not shown as I would want.
The style.css is not working (sometimes) and when I access to the login panel there is a redirect_to:
wp-login.php?redirect_to=/public/wp-images/smilies/wp-images/…./,../

Once I get in this error and I get back or type …/wp_login.php, I can access to the admin area. Once this is done, I go to my wpress site and then the style.css is working !!!!
I do not know why, that’s strange,,….
where does this redirect_to?=/…. come?
which is the archive that commands that?

some days before the site was working conveniently and I do not remember doing something apart post some articles.
Any Help???
check at:
http://www.gatodante.com/public/diario/

thanks.