QUdpSocket not receiving datagrams in Windows 7 Embedded.

[vanimg]

Hello,
I have an application that reads unicast UDP datagrams on port 13200. The application worked fine on Windows XP. I have moved the application to Windows 7 Embedded now. Here, I receive the datagrams for a minute or so, and then the slot is never hit. It doesn't receive even if I restart the application. But I see the datagrams on Wireshark. Firewall is turned off.
The application starts receiving datagrams only after I enable and disable the Network adapter/interface under 'Network Connections'.

Any guesses what could have gone wrong?

Thanks,
Vani