Arduino VCC issue?

I am trying to power 15 RGB LED's with an Arduino Pro Micro but whenever the VCC is connected the Arduino doesn't power on at all. As soon as I remove the VCC, it powers on and is recognised by the PC. 

The LED strip is wired correctly, in's match with outs, all grounds and powers are connected. 

I really can't work out what the issue is and I can't find anyone else with this issue after an extensive google search. 

Any helps would be much appreciated.

Thanks,

Ben