为什么我行成了VXD但不能调试呢？

请问我的驱动程序这样写的
.h文件
#ifndef USE_NDIS
#define USE_NDIS
#endif

#include <vtoolsc.h>

#define PACKET_Major 1
#define PACKET_Minor 0
#define PACKET_DeviceID UNDEFINED_DEVICE_ID
#define PACKET_Init_Order UNDEFINED_INIT_ORDER


VOID _cdecl dprintf( PCHAR pszfmt,...);
.c文件
#define DEVICE_MAIN
#include "packet.h"
#undef DEVICE_MAIN

Declare_Virtual_Device(PACKET)

DefineControlHandler(DEVICE_INIT, OnDeviceInit);
DefineControlHandler(W32_DEVICEIOCONTROL, OnW32Deviceiocontrol);
DefineControlHandler(SYSTEM_EXIT, OnSystemExit);

BOOL __cdecl ControlDispatcher(
DWORD dwControlMessage,
DWORD EBX,
DWORD EDX,
DWORD ESI,
DWORD EDI,
DWORD ECX)
{
START_CONTROL_DISPATCH

ON_DEVICE_INIT(OnDeviceInit);
ON_W32_DEVICEIOCONTROL(OnW32Deviceiocontrol);

END_CONTROL_DISPATCH

return TRUE;
}

VOID _cdecl dprintf( PCHAR pszfmt,...)
{
DbgPrint( pszfmt );
}

NTSTATUS NDIS_API DriverEntry(
PDRIVER_OBJECT aDriverObject,
PUNICODE_STRING aRegistryPath
)
{
NTSTATUS nStatus = NDIS_STATUS_SUCCESS;

dprintf(("DriverEntry...n"));
。。。
return( nStatus );
}
BOOL OnDeviceInit(VMHANDLE hVM, PCHAR CommandTail)
{
DriverEntry(NULL, NULL);

return TRUE;
}

DWORD OnW32Deviceiocontrol(PIOCTLPARAMS p)
{
return 0;
}
VOID OnSystemExit(VMHANDLE hVM)
{

}
这样写完编译后形成vxd 文件可是用Debug Monitor调试就是打不开一点go就出现错误请问怎么回事?