DIY LED

[GoneReefing]

Need some help with a 12 piece led setup. I have bought all the pieces and with the exception of one led being doa, have wired them and attached to the heatsink. So after i stringed the 11 leds in a series and connected them to my driver/powers supply. When i plugged it all leds flickered and then the first one popped (closest to the + driver).Anybody know what i may have done wrong? By the way I'm using a solderless connection that screws on top of the leds.I bought the kit from rapidled and will be order a couple of extra leds for the burnt out one.If anyone can help me with this and get this running I will give some frags in exchange for expertise . In a tight spot cuz i got to downsize my 75 gallon asap and sell it, so this will go in a 12 gallon to keep a few corals that ill keep until i can move into a new house.