  We present the status of a lattice calculation for the K-->pipi matrix
elements of the (delta S=1) effective weak Hamiltonian, directly with two pion
in the final state. We study the energy shift of two pion in a finite volume
both in the I=0 and I=2 channels. We explain a method to avoid the Goldstone
pole contamination in the computation of renormalization constants for (delta
I=3/2) operators. Finally we show some preliminary results for the matrix
elements of (delta I=1/2) operators. Our quenched simulation is done at
beta=6.0, with Wilson fermions, on a (24^3 X 64) lattice.
