So i rooted my nexus. I used the toolkit to do it. Every thing went good but now how do i get into cwm to make backups restore flash roms etc? Every timei hold volume and powerit goes to a screen showing an andriod with chest open but has a red warning triangle coming out of it. And thats where it stays. I left it like that for several minutes and no change. Also i down loaded cwm manager from playstore and i get the same results. Id really like to make a backup so i can flash a rom in. Help please?