Socket Problem with IP Pass through

Hi,
I am working on client server application. One of them has to run on symbian device (Nokia Phone) and another one on PC. I am using IP Pass through mode of the device.

Problem that I'm facing:

I have created and tested a sample application where symbian app behaved as a client and perl script as a server.
Results: Connection established and symbian client able to send the data to the server but not able to receive anything and waiting infinitely for a response from the server.(Here server running on my PC and device is connected with my PC via USB cable).

But if server is running on a different PC and device is connected on different PC, then we are able to send and receive data successfully.
Tested using two different machines one as a server and device connected with another PC as a client.

Using the above approach, this time I tried to establish a socket connection where server is running on a symbian device and client is running on PC. But server is not able to accept any connection this time.

Why that strange behavior? Why I am not able to receive any data whenever the Symbain device behaved as a server?
Any help in this regard is appreciable.

Thanks.