tbb_debug.dll missing, but it's there...

edit

I used to work with OpenCV 1.4 under Visual Studio, now I'm learning how to use OpenCv 2.4. I noticed it is waaaayyy more complicated to configure.

I'm using VS2010 over Win7 x64.

I configured all the project settings following this tutorial which is by the way, the only one that partially worked.

So I had the tbb_debug.dll missing error. The problem is that it is already there. Why does my project cannot see the DLL? The only way I manage to make my project work was by copying tbb_debug.dll under the x64\vc10\bin folder.

What should I do to make my project look inside the common folder?

Thanks