[HELP] cant go after boot screen topic

hi,
i undergrade 2.15 from 2.16 but i had mount sd card error so i upgrade it again to 2.16 but now when ever i flash any rom i stuck on boot screen or in cynogenmod rom it is restarting in boot animation ... please help me ... i am very tense ... i have s-off , unlocked , radio 1.20 cid 111111