驱动加载问题,拿位大哥能帮忙,谢谢

在装载的过程中,drivermonitor的输出:
6:14:25 PM   Default     D12_Driver: In DriverEntry Compiled at 15:27:06 on Jun  2 2004
6:14:25 PM   Default     D12_Driver: AddDevice called
6:14:25 PM   Default     D12_Driver: Entering D12_DriverDevice::D12_DriverDevice (constructor)
6:14:25 PM   Default     D12_Driver: i=0x00
6:14:25 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_QUERY_LEGACY_BUS_INFORMATION
6:14:25 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:14:25 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_QUERY_RESOURCE_REQUIREMENTS
6:14:25 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:14:25 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_FILTER_RESOURCE_REQUIREMENTS
6:14:25 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:14:44 PM   Default     D12_Driver: Entering D12_DriverDevice::OnRemoveDevice
6:14:44 PM   Default     D12_Driver: Entering D12_DriverDevice::~D12_DriverDevice() (destructor)
6:15:59 PM   Default     D12_Driver: In DriverEntry Compiled at 15:27:06 on Jun  2 2004
6:15:59 PM   Default     D12_Driver: AddDevice called
6:15:59 PM   Default     D12_Driver: Entering D12_DriverDevice::D12_DriverDevice (constructor)
6:15:59 PM   Default     D12_Driver: i=0x00
6:15:59 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_QUERY_LEGACY_BUS_INFORMATION
6:15:59 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:15:59 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_QUERY_RESOURCE_REQUIREMENTS
6:15:59 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:15:59 PM   Default     D12_Driver: DefaultPnp with IRP minor function=IRP_MN_FILTER_RESOURCE_REQUIREMENTS
6:15:59 PM   Default     D12_Driver: Entering TestDevice::DefaultPnp liu1
6:15:59 PM   Default     D12_Driver: Entering D12_DriverDevice::OnStartDevice
6:15:59 PM   Default     D12_Driver: Failed to get device descriptor
6:15:59 PM   Default     D12_Driver: Entering D12_DriverDevice::OnRemoveDevice
6:15:59 PM   Default     D12_Driver: Entering D12_DriverDevice::~D12_DriverDevice() (destructor)
   Monitor     -- end --
不知道是什么原因,望大哥给予指点.不胜感激!!!!!!!!