I had a new regulator installed in my 99 beetle about a month ago.. The body shop that put it in never could get it to work, he said you had to undo the negative side of the battery to make the window rollup and down..then it would quit and you had to do that again.. Well I tried that and never could get the window to go up or down.. This morning I stuck the key in the door to unlock it and both windows rolled down.. I turned the key back in the position to lock the door and the drivers window rolled back up..?? Any ideas what is going on here ? Thanks!