"Ok guys just to be sure :
first i have the same problem of yours and i am using spurkfun's boards.
1- https://www.sparkfun.com/products/8687
2-https://www.sparkfun.com/products/11373
i have checked the xbees on my arduino UNO and my laptop switching…"

"well i have your problem(APM2.5 & xbee pro 900) , i have tried every thing including checking the UART0 jumper connection , but from reading peoples's problems in this topic i've concluded (for now) that it's a spurkfun adapter problem , i am not…"