[chef] windows installation

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Hi all.
 There is a problem with my chef clients. I'm not a linux expert but i'm 
pretty shure that my server is Installed correct.The problem is that i cannot
install applications on my clients (windows server 2008 R2). I'm always 
receive
the following error : "NameError: uninitialized constant
Chef::Win32::Registry::HKEY_LOCAL_MACHINE"
Any suggestions???? 

Is there something wrong with my chef server or the problem is on my windows
server?

Please Help!!!

Thank you in advance