Compiler does not recognise Include Path?

[dominover]

CPP Include Path not seen by compiler??

I'm trying to build a CPP library and have set the CPP Include path as below.
I Am using Windows XP with MinGW compiler.

VARIABLE NAME: CPLUS_INCLUDE_PATH

VARIABLE VALUE: C:\CodeBlocks\MinGW\lib\gcc\mingw32\4.4.1\include\c++

I have restarted my PC several times but I still get an error message telling me that the file it is referencing (which is in this directory),, doesn't exist and the directory doesn't exist?

Any clues?? Maybe the variable I have used is only for Unix or something like that? ....s