Adding smilies (problem)

Hi all

First, sorry my bad english.

I`ve searching for solutions for the problem but I have not found anything.

I clic over "smilies"
Then I click over "Scan directory (img/smilies)"
I write a code and a emotion for a smilie (or for a few smilies)
I click over "Submit settings" and it brings me the login page but it doesn`t add any smilie to the database.

Any idea of what is happening? Thank you very much