OpenCL 2014 beta with Visual Studio 2013

Hello,

I try to install beta with VS 2013, but I have an "unexpected error"

In another discussion, I have see how to get log file (in attachment). There are some errors with Tahoma font and Dialog, but I imagine it's not the main problem. I have the impression that MSVC 2013 was not found, but it's on standard path (C:\Program Files (x86)\Microsoft Visual Studio 12.0)

Thanks for help