This is what I was gonna say. If you haven't done that but have set the crossovers, they're all @ "pass" and you essentially did nothing.You need to set the slope, have you done that? Also do you have the correct preouts going to the correct amp inputs?
I have run one for years and have in one of the cars here now, so if you want PM me, I can give you my number and we can work through it real time while I am infront of my unit and you are in front of yours going step by step.
i dont think this has been said yet: you have to have the speaker layout set on what i think the headunit calls 3 way (vs 4 speaker layout)