so u have your power going straight from the battery to the amp with a fuse just in case it shortcircuits as close to the battery? then, you grounded the ground wire from the amp to a close part in the chasis of the car, free of rust n paint? then did you connect your remote wire from the amp to the HU? i dont think the remote wire is essential, i think, correct me if i m wrong, that it's only used so that your amp turns on/off whenever u turn on/off ur HU.
if you did all this n still aitn working, one of the experts here should tell u about it. n they may come soon.