XBee Pro drops connection

Hi,

I have two XBee Pro modulese (XBP24) with last firmware (10E2).

First of this modules connected to ARM7 controller board and the second - to my PC. I use XBee Explorer to make a PC-connection.

I’m using transparent mode to communicate (115200 baud).

ARM always send data to a PC (as fast as it can), and PC send data to ARM every second.

Modules work well for a small period of time (minute or two), after this period module connected to a PC stops transmitting data (but still can receive). After PC module reset all is OK.

How can I solve this problem?