HELP HOOKING UP SORTA PLEASE!

Okay, me and my friend hooked up the sub and the amp correctly sorta (All the power part right) and it worked then stopped and he messed with it n it started to work again and then this morning it would not work and still wont, so I am not sure if I have the wires hooked up incorrectly or what. The amp still has power to it and it works, but the sub will just not hit for some reason. Here is how I have the outside hooked up:

http://s250.photobucket.com/albums/gg272/GoWproof/?action=view¤t=apowerwires.jpg
http://s250.photobucket.com/albums/gg272/GoWproof/?action=view¤t=aspeaker.jpg
http://s250.photobucket.com/albums/gg272/GoWproof/?action=view¤t=awires.jpg



Then I have my ground wire hooked up to the seat (Metal part that holds it down) and I have it hooked up to the head unit, but we had to do what he called a 3 way and he just taped them together real good. And with the speaker wires they are on L- and R-.. I figured it would have to be like L-, R+ ect ect, but he told me to have them on the two middle ones. I tried every combination possible with them and could not figure anything out. So any suggestions that could be wrong with it would be GREATLY appriceated!! Thank you! (The sub is brand new, just bought it yesterday, but the amp is used, bought it from my friend)  

well for some reason it wont let me look at the pics. if you look at the amp, it should have some sort of light or something to show if it has power. if it does its not the power or ground. if not i would check the ground because it is the most common issue. ive got mine grounded to the frame. you shouldn't need to hook up the sub to the speaker wires. do you have a stock or aftermarket deck? if its aftermarket run the remote wire to the wire either labeled antenna or remote. if it isn't any of those problems im not too sure  

ok i know you have probably figured it out by now since post is from 2 weeks ago but if you can get those pictures working i can def talk you through what  sounds like a crossover problem and what did you mean by he just taped all three together  
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My guess was he cut the wire, braided the three together and taped it  

lol, first time i tried to put a system in, no clue wat i was doin, just ran some speaker wires from the pannel speakers and thought magically that would work. I was going off wat i thought i knew, no one told me different.  
Datsun Man!