I pluged in two different cables in my pc and than to the printer (and the other way round) , but on my pc (surface pro2) it doesn't shows that the printer is connected.. If i wiggle on the usb-head from the cable on the printer, the display sometimes starts new with "welcome to creality" but thats allnothing happen

Also opend pronterface to see if it maybe isnt just shown and hit connect, but he connects, and connects...
Any suggestions? Solutions? Got it new yesterday and already frustrated (had three missprints, second one ruined the glas surface, now i have a permanent structuremark on it, filament was squisched out of the extruderwheels creating a spring...)

Very frustraded start but don't want to regret buying this printer