Proximity Sensor not working topic

i know there are a few other topics with Proximity Sensor problem but mine is a bit diffrent..

i just had my screen replace.. and the Proximity Sensor has stopped working.. when i press the upper right side of the phone the Proximity Sensor starts to work .. this is the 2nd screen i have tried this with .. and both have had the same issue .. i press the phone near the Sensor and it starts working but as soon as i remove my finger it stopped.. the Proximity Sensor app shows it at 3.0 cm..

my phone is running on CM 11 4.4.4

Kindly help :)