Event ID 50 & 56

Dear All,

I'm Receiving above error in Event Logs in every 1-2 Hrs,

I have tried all like below settings.
        1. Offload Receive IP Checksum
        2. Offload Receive TCP Checksum
        3. Offload TCP Segmentation
        4. Offload Transmit IP Checksum
        5. Offload Transmit TCP Checksum
        6. IPV4 Checksum Offload
        7. Large Send Offload v2 (IPV4)
        8. Large Send Offload v2 (IPV6)
        9. Receive-Side Scaling
        10. TCP Checksum Offload (IPV4)
        11. TCP Checksum Offload (IPV6)
        12. UDP Checksum Offload (IPV4)
        13. UDP Checksum Offload (IPV6)
Disabling Chimney / RSS
Netdma Disabled through registry,..  but still im receiving Event : 50 errors.

If any one having solution, please let me know. Thanks in Advance.

Regards
Ashfak