[Q] Custom Recovery wont Load topic

I have an SCH-i545 and It was recently on NK1, I downgraded to NC5 and used towelroot. Did a factory wipe from the recovery, but now I cant get either TWRP or CWM to load? It only uses the stock samsung/verizon recovery, and this is not letting me flash any custom rom. Did I miss a step somewhere? I've got SuperSU installed aswell.