i recently got a 597ci hd di combo for christmass. ive been messing around with it in simulator mode for a couple weeks now since its to cold to fish in new hampshire. one thing i noticed is that when in simulator mode it wont show anything in 455hz sonar. split or normal mode. i also noticed that my temp has disapered unless i activate the option on the bottom of the screen. just for shits and giggles i connected the transducer to it and ran it in normal mode and still couldnt get the 455hz to read. i have registered it with humminbird and tried to download the latest software but it says it is current. whats up? did i get one of the several i have read about that has issues? i have reset the factory default several times...