NDIS Receive Data

ProtocolReceive Handler in my NDIS driver is not getting called
eventhough the Ethernet packets are received by the underlying netcard
driver. My NDIS driver couldnt be able to recieve ethernet packets
through the NDIS ProtocolReceive Handler. it will be really helpful
if some one could be able to tell me the solution for this problem.

Bhanu Gogineni.