download latest 2.4.7 zip has problem?

I download the latest NUnit and copy the dll's(Core and Framework) into my
lib directory.  I then try my nant build and use nunit.exe and when I open
my Test dll, I get the following error....

system.IO.FileNotFoundException: <This is in chinese> "nunit.framework,
Version=2.4.7.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77" <more
chinese>

I also use exec nant task for nunit so developers don't have to install
nunit and I can upgrade nunit seamlessly without anybody knowing or
caring(ie. nant and nunit are checked into my SCM).  But, I get the
following error.....

     [exec] Runtime Environment -
     [exec]    OS Version: Microsoft Windows NT 5.1.2600 Service Pack 2
     [exec]   CLR Version: 2.0.50727.1433 ( Net 2.0.50727.1433 )
     [exec]
     [exec] 未能加载文件或程序集"nunit.framework, Version=2.4.7.0, Culture=neut
ral, PublicKeyToken=96d09a1eb7f44a77"或它的某一个依赖项。系统找不到指定的文件。


BUILD FAILED

c:\AAROOT\areas\docutech\WebServicesChina\bldfiles\project.build(149,7):
External Program Failed:
c:\AAROOT\areas\docutech\WebServicesChina\tools\NUnit\n
unit-console.exe (return code was -2)

Total time: 2.9 seconds.



What's wrong with the 2.4.7 zip file?  Why doesn't it work?
thanks,
dean

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