  Starting from the lowest order chiral Lagrangian for the interaction of the
baryon decuplet with the octet of pseudoscalar mesons we find an attractive
interaction in the $\Delta K$ channel with L=0 and I=1, while the interaction
is repulsive for I=2. The attractive interaction leads to a pole in the second
Riemann sheet of the complex plane and manifests itself in a large strength of
the $\Delta K$ scattering amplitude close to the $\Delta K$ threshold, which is
not the case for I=2. However, we also make a study of uncertainties in the
model and conclude that the existence of this pole depends sensitively upon the
input used and can disappear within reasonable variations of the input
parameters. We take advantage to study the stability of the other poles
obtained for the ${3/2}^-$ dynamically generated resonances of the model and
conclude that they are stable and not contingent to reasonable changes in the
input of the theory.
