Gauges installed

ok i installed the reverse gauges and they look great. i never even had to take the glove box out. just the rpm/speedometer gauges and a/c vent.. but there was little, to no room. and it took me forever. well now i am at a problem. .. after i put it all back in and screwed it all in.. the center gauges are not working.. now i felt around the back as best as i could and im sure they are hooked up. (concidering i never disconnected them). does anyone have any ideas that i may have over looked? i checked the fuses.. and they are all good. any ideas??