I was fishing a couple of lakes last week that I know has some structure. My FF wouldn't show the structure or fish. Judging from the pics is it possible that I have a setting wrong on the unit? Also, do I need to do any updates on it? I have had it about 2 yrs and have never had any problems with it. Any ideas? Thanks. Sorry for the sideways pic. Name: IMG_0290.JPG Views: 209 Size: 95.5 KBName: IMG_0292.JPG Views: 175 Size: 119.0 KB