谁知道下面的连接错误怎么回事？

  Deleting intermediate files and output files for project 'filter - Win32 Checked'.
--------------------Configuration: filter - Win32 Checked--------------------
Compiling resources...
Compiling...
stddcls.cpp
Compiling...
DriverEntry.cpp
RemoveLock.cpp
Generating Code...
Linking...
LINK : warning LNK4027: CVPACK error
Error executing link.exe.

filter.sys - 1 error(s), 1 warning(s)
编译的是windows wdm书中的例子程序。