Publishing in Android

Hi, I have a problem… I want to upload my apk but the android market bring an error telling me that my application is in debug mode.
So, I open the player settings and create a new keystore but when I want to change the Alias the only option I have is “Unsigned (debug)”

What am I doing wrong?

I have Unity free version 3.5.6 with Android and IOS license.

Have to sign up with for a developer account with google android. Then sign your app.
Here, have a thread link: Android Signing

Thanks! It was very helpful!