Anyone can help?I have downloaded a few themes for N80 but the installation display a security warning: "Application is untrusted and may be harmful to your phone." Then i press continue 2 times and this is will the appeared on the display "Application not compatible with phone.Continue anyway?" i press yes and the error : "Unable to installed a protected application from an untrusted supplier". Wat should i do???pls help!!!

Anyone who owns a N80 too,can help?pls?