  We prove a version of Ihara's Lemma for degree q=1,2 cuspidal cohomology of
the symmetric space attached to automorphic forms of arbitrary weight (k\geq 2)
over an imaginary quadratic field with torsion (prime power) coefficients. This
extends an earlier result of the author which concerned the case k=2, q=1. Our
method here is different and uses results of Diamond and
Blasius-Franke-Grunewald. We discuss the relationship of our main theorem to
the problem of the existence of level-raising congruences.
