Case auto screen lock unlock topic

Hi. Everyone I'm a newbie to this forum. Although I've flashed Many other HTCs in the past.

Sorry if this seems trivial
I have flashed my HTC m8 to the latest venom image as I liked the look of it. However now my new case that on the stock Rom would turn the screen on when opens and off when closed. No longer works. Can anyone tell me a fix please.

Thank you in advance