RedAP2S2K

Ok, so i have been doing a little work to my car to get it ready for paint in june, and i just recently replaced my front left steering spindle. Everything seemed to go back together perfectly fine, and now when i start my car the ABS light stays on. I know the wheel speed sensors will cause this light to stay on, but i replaced it back on there just the same way it was. i don't understand what to check next......fuses should be fine i didn't pull or yank the sensor to make it come out or anything. So im kinda dumbfounded on what i could do to fix this? Any help would be greatly appreciated.