为什么我的代码不能工作？

i have got OID_802_11_STATISTICS\'s value and i can display
correctly, i put the follow function in the OnTimer event.
however, all of the value(transmitCount and receiveCount)
i got is zero.(my thought is to display the number of
transmit and received packages looks like the network
status)

void OnTimeer(XXXXX) {
    IoctlNdisQueryTest(lpAdapterName)
}


DWORD IoctlNdisQueryTest(LPCTSTR lpAdapterName)
{
    NDIS_802_11_STATISTICS OidData;
    DWORD       nResult, ReturnedCount = 0;

    ZeroMemory( &OidData, sizeof(OidData));
    OidData.Length = sizeof(OidData);
    nResult = Test_IoctlNdisQueryGlobalStats
      (lpAdapterName,OID_802_11_STATISTICS,OidData,sizeof
      (OidData),&ReturnedCount);

    if( nResult != ERROR_SUCCESS )
sprintf(sLabel,\"%s\",\"The driver unsupported\");
    else
        sprintf(sLabel,\"%I64d,%I64d\",
          OidData.TransmittedFragmentCount.QuadPart,
          OidData.ReceivedFragmentCount.QuadPart);

.