i installed the new firmware in my C100 however the continuous focus mode is not available in the menu when I have my EF-S18-135mm f3.5-5.6 IS STM lens on the camera Only One Shot is displayed in the menu. AF is selected on the lens switch. The camera communicates OK with the camera when in one shot mode and the one shot focus mode works as it should. But the option to select continuous focus is not available in the menu. A I understand it, this lens is one of the compatible lenses for continuous autofocus on the C100. Am I missing something?