The Z, being a technical japanese monster that it is, you prob just need to reset the computer. First try unplugging the batter, replugging it and seeing if that helps, if not read the manual. I remember when i installed my cai, i had disconected the battery, then when the cai installation was all said and done and i was happy, I realized my automatic up and down windows wouldnt work, so I could not leave my z without the window being cracked open (cause if you notice when you open your door it pops the window down a crack to clear the door to be opened, and when you close back the door the window automatically goes up a crack again, mine wasnt going back up) After 2 min of scanning the manual, I found out how to "reset" the window computer, and vwalah, all good!
Hope this is all you have to do to fix it!
+1 on not opening the door for your gf, maybe on a day like valentines day, otherwise
