Unescaped backslashes are Deprecated at mobility.prf:1

i am new to Qt for Symbian Development and i am stuck at one problem that when i tried to build my Qt Project then three Warnings are occurred there which stops the build process:

WARNING: D:\QtSDK\Simulator\Qt\msvc2008\mkspecs\features\mobility.prf:1: Un开发者_开发知识库escaped backslashes are deprecated. WARNING: c:\QtSDK\Simulator\Qt\msvc2008\mkspecs\features\mobility.prf:1: Unescaped backslashes are deprecated. WARNING: c:\QtSDK\Simulator\Qt\msvc2008\mkspecs\features\mobility.prf:1: Unescaped backslashes are deprecated.

Please help me to rectify this issue that why these warnings are occurring. Thanks

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I have resolved it....
By just uninstalling the Qt and then re-install it...