Jensen Amp and Sub

Hey

I just bought some used equipment and had it installed. Jensen 300watt amp, 10" JL Audio sub and a Stinger powercap.

I turn the car on and nothing, the amp comes on, but the light stays red.

I have a feeling he wired it wrong, I tried to pay attention as much as I could so here goes.

He took 2 RCA Cables and a thin cable and a power cable from the battery to the Jensen AMP, Than he mounted the ground cable to a bolt that is used for my strut...Im pretty sure its not 3 feet.

The thin cable he hooked up to a wire called 12V+ Power Antenna. The 2 RCA Cables are secured.

I checked 2 fuses that comes with my cd player and the fuse on the positive line, even the amp fuse, everything fine....

Im not very good at this, but I am going to try really hard to get this too work..

1. Why wont the green light stay on

2. Is it wired wrong?

3. Is it my cd player? < Wired it myself.