  We study a supersymmetric field theory in six dimensions compactified on the
orbifold T^2/Z_2 with two Wilson lines. After supersymmetry breaking, the
Casimir energy fixes the shape moduli at fixed points in field space where the
symmetry of the torus lattice is enhanced. Localized Fayet-Iliopoulos terms
stabilize the volume modulus at a size much smaller than the inverse
supersymmetry breaking scale. All moduli masses are smaller than the gravitino
mass.
