I ahve a 2001 Zercom flasher and while on the water this morning it started acting funny. First run I press the suppression button and it works fine. The second run is when it went crazy. I turned my power on and turned on the flasher and the sensitivity started counting down to zero almost like the button to lower the sensitivity was stuck. I can hold the button to raise sensitivity and it will go up but as soon as I let off that button it starts counting back down again. Any suggestions? Thanks for any advice in advance.