pinpointing

I'm having trouble roughly locating and pinpointing my target after I changed from a concentric coil to a dd coil. I'm running a garrett ace 200 with the 8.5X11 Proformance DD coil. Any advice I'm not sure what to do.

Has anyone had a problem with the pinpoint not working? I press the button and it make a noise but it is not working like it did when I first got it. What about the detector making tones but not showing any numbers? This happens several times during use. I use Pro coin mode. Thanks :skullflag: