  We analyze the possible existence of a resonance in the $J^P=0^-$ channel
with isospin two by means of nucleon-$\Delta$ interactions based on the
constituent quark model. We solve the bound state and the scattering problem
using two different potentials, a local and a non-local one. The non-local
potential results to be the more attractive, although not enough to generate
the experimentally predicted resonance.
