Faucet leak from the connection with spout.

I just install a brand new American Standard faucet. Two knots and center spouts that turn. No leak at the water lines, no leaks at the knots but water is shooting out of the connection between the spout and the plate. I try to turned the rings connect the spouts to the rest of the faucet as tight as reasonable but still same amounts of leak. I check and the connect have the require two O rings.