Sheila D

I have 2006 Lexus rx 400h with 138,000 miles on it. I recently changed the rear brake pad on it and afterwards when I started the car, the "Check VSC System" light came on. Then the ABS/Brake/Slip Control lights came on. When I changed the rear break pad, I disconnect the negative battery for safety purposes, is that why the lights came on. I drove the car for awhile already and the lights are still there. Does anyone know how to reset this problem?