OpenAT 4.0 ... don't work correctly


I’m d/l lastest version of OpenAt …

After unzipping, i’m installed OpenAT and Dev. Tools.

Now i’m try to build sample Hello World!
I’m do all with TU_Tutorial_for_Open_AT_V4-00_rev002.pdf
but when i’m selected Hello_World_rte project as active and try to duild it from VC. I have this message:

--------------------Configuration: Hello_World_rte - Win32 Debug--------------------
Error spawning cl.exe

Hello_World_rte.dll - 1 error(s), 0 warning(s)

Does anybody know what is ? And why nothing to work …
Also i’m don’t find tcp ip library and documentation in this OpenAT version.