X-bee technical issue

Hello,
Myself is sarin. I have a RCM5700 module and two X Bee pro module. I am trying a two way communication system with these modules, i.e.,

Computer1 -> RCM5700 -> X Bee1 -> X Bee2 -> computer2 and

computer2 -> X Bee2 -> X Bee1 -> RCM5700 ->computer1

Here data will be send and displayed through Hyperterminal. Even though i am able to transfer data from computer 1 to computer 2 and viceversa some garbage values are also displayed with actual data. When no data is communicated even then some garbage values are displayed like v,w+,~~,~,@ etc. When i disconnect one X Bee this problem will not happen. Please help me to solve this problem

rgds
sarin