DriverMonitor调试问题请教

我按照书上的例子写好一个WDM程序，用DriverMonitor调试时给出下面信息：
Monitor     Unable to start the support driver.
   Monitor     Local messages will not be available.
   Monitor     Remote reader thread started
   Monitor     Using system32\\drivers\\regsample.sys for service RegSample
   Monitor     Using existing service database entry for driver.
   Monitor     The driver has already been started.
   Monitor     Unable to create service for driver: Error code: 6
   Monitor     ERROR (6): No driver is currently open.
   Monitor     ERROR (6): No driver is currently open.
   Monitor     ERROR (6): No driver is currently open.
   Monitor     Driver path set to E:\\WDM\\RegSample\\sys\\objchk\\i386\\RegSample.sys
   Monitor     Using existing service database entry for driver.
   Monitor     The driver has already been started.
   Monitor     The driver is already running.
   Monitor     ERROR (1052): The driver is not in a state to accept this
   Monitor     -- end --

我按“go”按钮时说“The driver has already been started.
  ”，且按“stop”时说“ERROR (1052): The driver is not in a state to accept this ”
不知是什么原因，还请高手指点！！

我也出现这个问题，后来我改用了DbgView，就好了，建议你也用用这个软件，各个地方都有的下。