Possible Bug in PreparedStatement

Please do not respond last email, only this...

public int cedula_actualizar(String strcedula, String strids) {
PreparedStatement ST = null;
int retVal = 0;
try {
ST = conexion.prepareStatement("UPDATE maestro_partes SET
cedula=? WHERE consecutivo_identificacion IN (?)");
ST.setString(1, strcedula);
ST.setString(2, strids);
retVal = ST.executeUpdate();
ST.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return retVal;
}

When execute this function with single data like this 3434 in strids, it
works, but when is pass somethine like this: 12232,3434,3,4545,34,3
don't work, Why?
In database cedula is varchar and consecutivo_identificacion is int