Talbucks

I just installed my Avic X940 into a Nissan Titan. Maybe this is normal but every time the system boots up I hear 2-4 beeps and the volume for the stereo is 0. I have to turn it up every time I get into the car. Does this system have a setting to remember the previous volume or did I hook something up wrong. Everything else seems to work fine. Thanks for the help.