> Found the issue -- was using Prepared Statement instead of Callable
> statement. Works like a champ, now.

Did you use the escaped syntax ("{call ....}") or Firebird syntax (EXECUTE
PROCEDURE)? If latter - it should work correct. If former - it should report
you an error. If one of the above did not happen, please explain in details
what you have executed, since that might be a bug in JayBird.

Roman