Hi, thanks for reading this. I recently tried to flash the Hyperdrive rom RL15 on my Galaxy s4 i337m. I had a stock 4.3 mk6 firmaware and since its a m model the bootloader is unlocked. I rooted the phone, installed TWRP 2.7, Factory wiped and flashed the rom itself with the ATT compatibility pack. Unfortunately after starting the phone, it went into downloading mode, with a message on the left side saying that couldn't do normal boot. I'm trying to understand where the problem is, and any input would be appreciated.