motherboard installation

installing biostar motherboard, having problems with front panel connectors, followed instructions from the manual, the fan turns on, and i get it to work, i can boot up, but the light on the case won turn on, I even tried another motherboard an ECS elitegroup and the same thing happens, so far ive put together three gaming computers, and they work just fine, but this last one is really buggin me. Can anyone shed any light to this.

Thanks:cool

 

Have you got the FP connections in correctly?

Coloured positive, black negative, please double check.

You could just have a faulty light on the case, what case do you have?