problem with xbee s6b and arduino uno

Hello alltogether,

i use an originall arduino uno, an originial arduino wireless sd shield and a xbee s6b w-lan module.
for testing procedure i want to configure the xbee with x-ctu.
but the program x-ctu can not find the xbee s6b.
the xbee is linked to the pc with all components above and a usb wire.
i tried to change all settings (baud, bits, etc.) and searched the web,
but failed to find a solution.

any ideas where the problem might come from? :slightly_frowning_face: