when you fill an automatic gearbox, you must put in the correct type/amount of fluid, then start the car, and keeping the brakes ON, go though all the gears to settle the fluid thoughout the g/box, this should solve your problem, if not you might need to go to auto transmission techie, (not main dealer), but auto boxes are expensive to repair, might be cheaper to get replacement from good scrappy. Good Luck.
hope it helps
October 2010