NDIS 6.5 offload checksum test failure - HCK NDIS 6.5 not accepting packet checksum

Question

We are developing NDIS 6.x miniport driver and are running NDIS Test 6.5 and are encountering failures in Offload Checksum when Rx checksum offload is enabled. The failures are as below indicating that the notified packets are not accepted by HCK test ,
even though it receives the packets .  We have validated that the checksum is correct by recalculating it in driver and also through wireshark captures on the receiving and send sides. 
We hereafter refer to the test adapter as Test10GCard and the support adapter as Support10GCard.
To eliminate the issue, we also have swapped the role of the Test10GCard and Support10GCard . In this case, the Test10GCard became the support adapter and Support10Gcard as the "card under test".  In this case, the test failed in send itself,
as the packet notified by Test10Gcard to the stack , even when checksum offload is disabled was not accepted.
 We have looked at NET_BUFFER, NET_BUFFER_LIST  , packet and checksums as well.
Any suggestions?  We have been stuck on this for a long time now.
Thanks
Deva
10001
StartTime: 02:48:48.497
Checksum offload - Test Tcp receive checksum offload with Ipv4 ( Tcp checksum recv offload: On/Tcp Option: Off/Ipv4 Option: Off). Packet count: 30; Packet header size: 54; Packet total size 784
CommunicationHelper::StartReceive
- Name: TestDeviceSimpleCommHelper
- Type: SimpleCommunicationHelper
- Traffic Manager Type: NDT_SIMPLE_TRAFFIC_MGR
- Receive Process Mech: NDT_PROCESS_RECEIVE_AT_PASSIVE
- Configured NetBufferModuleStack:
- [1] NDT_STRESS_PAYLOAD_MODULE
- [2] NDT_TCP_OFFLOAD_MODULE
- [3] NDT_IPV4_HEADER_MODULE
- [4] NDT_ETHERNET_MEDIA_HEADER_MODULE
- STATUS: NDIS_STATUS_SUCCESS
CommunicationHelper::StartSend
- Name: SuppDeviceSimpleCommHelper
- Type: SimpleCommunicationHelper
- Traffic Manager Type: NDT_SIMPLE_TRAFFIC_MGR
- Send Mechanism: NDT_SEND_AT_PASSIVE
- Send Complete Mech: NDT_VERIFY_SEND_COMPLETE_AT_PASSIVE
- NDIS Send Flags: 0
- Send Latency (ms): 0
- Preallocated NBL Count: 1
- Configured NetBufferModuleStack:
- [1] NDT_STRESS_PAYLOAD_MODULE
- [2] NDT_TCP_OFFLOAD_MODULE
- [3] NDT_IPV4_HEADER_MODULE
- [4] NDT_ETHERNET_MEDIA_HEADER_MODULE
- STATUS: NDIS_STATUS_SUCCESS
EndPoint::WaitForSendsToComplete
- Name: SuppDeviceSimpleCommHelper_EndPoint
- Timeout (ms): 300000
EndPoint::StopReceive
- Name: TestDeviceSimpleCommHelper_EndPoint
- Timeout (ms): 5000
EndPoint::GetSendResults
- Name: SuppDeviceSimpleCommHelper_EndPoint
EndPoint::GetReceiveResults
- Name: TestDeviceSimpleCommHelper_EndPoint
EndPoint::GetSendResults
- Name: SuppDeviceSimpleCommHelper_EndPoint
Test Tcp receive checksum offload with Ipv4
Tcp Checksum Offload Enabled
Tcp Option
Ip Option
StressPayload Test Conclusion
StressPayload Test Explanation
Tcp Send Packet Number
Tcp Recv Packet Number
Accepted Checksum Recv Offload Packet Number
Tcp Offload Test Conclusion
Tcp Offload Test Explanation
Yes
No
No
Passed
N/A
30
30
0
Failed
Tcp Module expected to get 30 packets, but only accepted 0;The miniport is expected to report 30 packets with correct checksum, but only gets 0;
50019 Test case failed. For detailed information, please see the above log table
Possible failure reason             

Answer 1

Hi Mudit,
Thanks for your replay. I checked the NDIS6.5 Checkconnectivity and Checkconfig these tests were passed. The above Same logic I applied for L3 Check-sum,  then all variations were passed. But only the TCP/UDP
packets only NDIS is not accepting. I put the wire-shark on both sides the packets were same i.e integrity is fine. 
Regards
Mallesh