PowerAcoustik LT1440/2, 12" Solo Baric L7

Recently I bought a LT1440/2 online, but i accidently threw away the empty box, including the owner's manual. I have the amp wired with Power Acoustik 2 Gauge 3000 Watt Amp Kit. The amp is bridged to a 12" Solo Baric L7. The remote wire was wired to the amp remote wire on my wiring harness, the power wire was run to the termnal, and I wired the ground using a bolt on the deck lid of the inside of the trunk. I turned the key forward and the red protection light came on, but after a few seconds it turned on and all was working smoothly for about five minutes, then it kicked itself into protect mode while changing songs. So I rewired the ground to the car's ground wire, where one wire was already grounded to a bolt on the inside rear of the trunk towards the bumper. I turned it back on and the red protect light came on again, this time it never switched back on, so I then turned the gain down to 50% from about 65-70%. Tried again, it still didn't work. So then I switched the remote wire from the amp remote wire on the harness to the hot(red) wire, thinking that I might have fried my remote wire on the CD player. Tried again and still got the protection light. Need answers or help troubleshooting.