Default [Q] Battery draining when flashed custom rom

I own a Desire HD and I just (clean) flashed CyanogenMod 11 Releases version (http://forum.xda-developers.com/show....php?t=2533007) and I have a problem with the battery since it is draining very fast. I notices that the phone is staying always awake. I am HTCdev unlocked with s-on. I followed the exact steps on the thread but still has the battery problem. How can I fix this issue?.. Previously I flashed other ROMs with the same problem. Am I doing something wrong or do I need to gain s-off first?

Any help would be greatly appreciated.
Thanks