Mustang,
Check if you have the phase correct.. (positive to positive - negative to negative .. and high to high and low to low) another idea is to see if maybe you didn't crush the voice coils in re-assembly..
I have done all the above before.. it's all part of the learning process..
with peavey's most of the time you won't do any immediate damage.
Just take your time doing it..
PS look at the coils carefully incase you burned one too..