Have you tried to test your xbee module with different baudrate setting in your X-CTU?
I think he hardware design should be fine. We always use the Xbee adapter to configure the xbee modules also! It shouldn't cause some problems for you! :)
Ahh I tried 9600 baud and it worked, thanks!
For some reason I had in my mine that the X-CTU software automatically tried different baud rate. :-[
;D Glad to hear that you make it work!
If any suggestion, please feel free to contact with me or post it in our forum!