  In {\em Nucl. Phys.} B {\bf 615}, 285 (2001) [arXiv:hep-th/0107113], the wave
equation for a minimally coupled scalar was studied in the geometry of a D1-D5
system with non-zero angular momentum. The probability for a quantum to enter
the throat was computed by taking small a parameter $\g$ which is associated
with the value of the angular momentum. In the leading order in $\g$, the
result was found to agree with the dual CFT result. In this note, we report on
an observation that there are corrections of higher order in $\g$. Our results
should be useful for determining the higher order correction terms that the
dual CFT needs in order to incorporate the presence of the `capped' geometry.
