Usually a led is associated with some function like a fan or an on off button , what is this led supposed to be for? Where is it located ? Up near the usb plugs and the on/off bottons? When you say the front fan does work are you saying that the led is for the front fan? If the front fan has led then it could have a seperate plug that needs to be connected and you might want to check the wires that came with the case and are routed towards the front and see if there is a seperate plug for a led for the fan.
yup the LEDs are where the fans are, ive checked several times with the small connectors ive hooked up as well as to see if i didnt connect anything... everything seems fine O.o