Monitoring button not working

Hi guys,
i’ve had a problem with the latency response of my mic and now the monitoring button is not allowing me to select it to turn it orange.

Basically, when i speak into the mic, the stereo input level triggers at the same time, however the vocal channel has a delayed response… to try and find a way of fixing i’ve chooses a preset on the inputs window as shown on the screenshot and now the monitoring button isn’t allowing me to select it and turn it orange when i’m in the project window.

really in need of help…
thanks
Screen Shot 2017-03-26 at 16.38.17.png

Hi,

Make sure, any input is selected in the track, please.