NxOgre not compiling the first time.

Well i have downloaded the betajaen-nxogre-e7f92bb, the last Nvida System Suport and Nvida SDK 2.8.4.

My Nvidia Sdk Folder is: C:/Dev/Physysx (Inside this folder i have the others folders : Bin, Externals , Graphics,Samples, Sdks,SysRelease,TOols)
My PHYSX_DIR env variavle is set to : C:/Dev/Physysx

yet i still not able to build the project, i get this error(a lot of times): Cannot open include file: 'NxPhysics.h': No such file or directory

As i saw in this forum this problem is related to the env variable, but, i tried a lot of others folders related to the SDK and nothing.
Do anyone(or everyone) knows what's wrong here ?

Solved the problem already, you can't install the SDK in one hd and the nxogre in another.

Solved the problem already, you can't install the SDK in one hd and the nxogre in another.
what? never faced a problem like that before