  In an earlier work it was shown that the IR singularities arising in the
nonplanar one loop two point function of a noncommutative ${\cal N}=2$ gauge
theory can be reproduced exactly from the massless closed string exchanges. The
noncommutative gauge theory is realised on a fractional $D_3$ brane localised
at the fixed point of the $C^2/Z_2$ orbifold. In this paper we identify the
contributions from each of the closed string modes. The sum of these adds upto
the nonplanar two-point function.
