Laser not Calibrating

Just purchase my SnapMaker 2.0… I connected everything correct I believe… I was about to laser something just getting my unit to calibrate to start but the top bar just jerk then stop… when it goes to measure the height it does that and nothing else… i came move with with little unit or nothing… Secondly for some reason it will not connect to my wifi it keeps tell me wrong password code…
Can someone assist… also… is there a way to reset the little panel… to start over again…