No start 2003 dodge caravan

I have a 2003 dodge grand caravan and it has been
running just fine then all of a sudden I go to start it
and it does nothing I have all my dash lights and
inside lights and headlights but when I turn the key
to start it all I here is a click coming from the fuse
box..... I have replaced the starter and siloniod and
the battery and altanator and the front control
module and even the neutral safety switch and it is
still doing the same thing I am in desperate need of
ideas and advice please help me get my van back
on the road...., thank you