Bluetooth programming using python

Hi,
I have created a RMCOMM port. In my program I am sending some data from device1 to device2 and receiving some data from device2 to device1.
But after sending data to device2 when device1 waits for data to arrive from device2 I am always getting the follwing problem.

File "C:\Python26\Lib\site-packages\bluetooth\msbt.py", line 41, in bind
status = bt.bind (self._sockfd, addr, port)
IOError: Only one usage of each socket address (protocol/network address/port) is normally permitted.

Please help me

Without your code I can only guess what's wrong. From what I can detect from the error message you might be using the pybluez package. If so maybe the line should better read Try to understand the documentation for pyblues. Reading the examples for rfcomm server and client carefully may be helpful.