gregten

I have a 2000  XJ8 3.2 Sport.. All was wonderfull, bur stupidly I let the battery run totally flat.. After replacing it with a new one, I am getting a few fault messages and warning lights. One being the stability control and ABS lights, but the most serious is the message GEARBOX FAULT, and the car goies into limp mode.. If I turn off the engine everything is fine for about a minute, then it goes back into limp home mode and the dashboard warnings come back on ... Please Help Me.  !!!