  It is demonstrated that the well-known answer for the multiple-scattering
series (MSS) for a light particle interacting to a pair of static nucleons,
calculated in the Fixed Centers Approximation (FCA), works well for a wide
region of the two-body complex scattering length $a$. However, this approach is
not applicable in a narrow region surrounding the real positive $a$ half-axis,
where the MSS does not converge. Simultaneously, for real positive $a$'s the
3-body system forms an infinite set of bound states.
