Need help on my turn signal problem

I just put in some LED bulbs in my rear taillights for the signal lights, they flashed normally with the normal bulbs and when I have the emergency flashers on even with the LEDs in. When I turn on the left or right signal by itself with the LEDs in, the blinkers go crazy fast, its pissin me off, can anyone help me and tell me how i could maybe fix it!!!!!!!! Thanks