dbus_shutdown call

[Ge@@ru]

Hi at all,
 i want use dbus_shutdown function for deallocate internal dbus variable
before exit from my application and avoid valgrind warning.
On bus session this works fine but on system bus i have this abort:
process 26586: dbus_shutdown() called but connections were still live.
This probably means the application did not drop all its references to
bus connections

Why? Have you an idea how can i resolve this problem? 

Thanks in advance.

Ge@@ru