clio 172 cup sport xreg?

hi can someone help please. i have a clio 172 cup sport on a x reg. been away for eight months and went to start my car and battery was dead flat nothing there. took off old battery and replaced it with a new one. also new key fob battery. went to start the car and turns over but not fireing up. red light is flashing on the dash next to stop and serv. also key fob wont open or lock car. any ideas would be very much welcome. pete