my 740i trans problems

A couple of weeks ago the trans started acking funny in my car, reverse went out and then, when I was parking it stopped and the car turned of and it won't start it was very sad I had to get a couple of freinds to help me get in a spot (man these are heavy cars!!) and then it wouldn't start at all. I was wondering if this was part of the electronics that when the trans program had a error or what? Any help is greatly apreciated.