heating up

this sux,for sum reason my truck is throwin the coolant out of the radiator n cuz of that its heating up,i just put a new radiator in,wat can be the prob?im thinkin it had too much coolant n it so it throws it out,n wen it does that i guess is throws too much out.can that be it?

it can if you over fill it i dunno bout all of it coming back out that doesn't seem right