Please check which power supply you are using. You should have enough power to support POE on the devices that you are going to power up. Please use Cisco power calculator to check out the proper power allocation to the connected devices.Another thing to check for the minimum and recommended IOS for the modules you are trying to put in the chassis.
http://www.cisco.com/go/powercalculator
HTH,Please rate if it does.
-amit singh