I get error when I click 'build-win32.bat'.

cocos2d-x C++
#1

Who can help me ?

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       “$DIR\cocos2d-2.1rc0-x-2.1.2\cocos2d-win32.vc2012.sln”(默认目标) (1) ->
       “$DIR\cocos2d-2.1rc0-x-2.1.2\samples\Cpp\AssetsManagerTest\proj.win32\AssetsManagerTest.vcxproj”(默认目标) (8) ->
       (Link 目标) ->LINK : fatal error LNK1181: 无法打开输入文件“libExtensions.lib” [$DIR\cocos2d-2.1rc0-x-2.1.2\samples\Cpp\AssetsManagerTest\proj.win32\AssetsManagerTest.vcxproj]
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