Finally, i got solution for "could not update ICEauthority file /home/Evanjalin/.ICEauthority". Am beginner to fedora and probably its wrong or right. may be this will help for those who like me. So i just post what i did and its work for me (fedora17 32 bit).
Problem in my root user (i.e) user.
2)login with your root
3)if you not create secondary user already, create user as
4)$sudo chown user1:user1 /home/user1/.ICEauthority
$sudo chmod 777 /home/user1/.ICEauthority
$sudo chown user1 -R /home/user1
5)This change the root access permission to new user and user1 act as root.
press ctrl+alt+F3/ctrl+alt+F4. you can view the fedora display.
chmod which is used to give permission for file, folder etc.. read, write and excute (4+2+1=7). According to your wish you can change it... google it...