Hifonics Atlas XI

I'm a fixit yourself person and I really need some help on this one. First of all the amp was giving to me alreadysemi disaasembled. All the N-Channels mossfits where missing sept for 1. I grabbed the number off of it and ordered new ones. I checked for shorts after installing them, checked out ok. Installed in my vehicle and it does work but,it is getting hot very fast and is also trying to melt the power and ground wire when on. I don't think them are the right power mossfits that belong in this amp. The only one in it where I got the number to replace it, you could tell that it got replaced before.How can I get a hold of a schematic or just the number off an original power mossfit so I can fix this amp the right way....