mobile

HELLO fellow android users,i am having a problem with my lg g2 sprint(ls980),i am running android 4.4 kitkat(ls980ZVE) but i decided to use the latest cyanogen mod nightly package,i order to do that i installed TWRP using Auto rec app,it installed TWRP successfully then i rebooted into The TWRP recovery and installed the cyanogen mod 12 and GAPPS,it installed successfully then rebooted my G2 but unluckily my phone got stuck at the lg logo,it keeps rebooting at lg logo,i know how to flash back to stock rom but i want to use a custom ROM,

A HELP will be appreciated...

THANKS IN ADVANCE...