new fish/depth finder

stinky, thats the same unit i have now. it shows the bottom, temp, speed, voltage just fine but I cant get it to show fish. i've read the manual and did the online simulator at their web site. nothing I do seems to help. Im on my third transducer in 5 years now and Im pretty sure i got it level. any similar experience?

;)maybe there are no fish and I need a new spot!Haha

I catch my share of salmon and a few sturgeon here but they dont show up on the screen...Im thinkin I could do more catchin if I could see em you know what I mean.