Midpoint snap not working in sketch

Good morning ,

     A coworker is having an issue when it a sketch he is not able to snap the midpoint. He is however able to right click on the line that is drawn and press select midpoint. I have double checked the settings and midpoint is selected. I have compared my settings to his and I am not able to find anything different. Is there something that I am missing?  

SolidworksAdministration