Simple ANSYS Problem

Hello,

I have a simple problem but I am having a mental block concerning combining three different materials with different poisson's ratio and modulus.  The problem is a plate with a hole and I can generate a mesh and apply load but I can not seem to create three materials and combine them together.  Any help would be greatly appreciated.  Here is what my input file looks like:

/Title, Isotropic Plate w/ a hole and mesh refinement
*Set, a, 1000e-6
*Set, r, 100e-6
*Set, p, 15e6
*Set, E1, 12e9
*Set, E2, 15e9
*Set, E3, 6e9
*Set, PRXY1, .27
*Set, PRXY2, .3
*Set, PRXY3, .29
/PREP7
ET, 1, PLANE82
MP, EX, 1, E1
MP, EX, 1, E2
MP, EX, 1, E3
RECTNG, 0,a,0,a
CYL4, 0,0,0,0,r,90
ASBA,1,2

LESIZE, 8, , , 50, 0.25, , , , 0
LESIZE, 9, , , 50, 0.25, , , , 0

SMRT, 2
MSHAPE, 0, 2D
MSHKEY, 0

AMESH, ALL

DL, 8,3,SYMM
DL, 9,3,SYMM
SFL, 2, PRES, -p,

FINISH
/SOL
SOLVE
FINISH