Truecrypt 7.0 build

Question

I'm trying to build Truecrypt 7.0
I have build the driver. But I can't build the Boot Project.

1>------ Build started: Project: Boot, Configuration: Release Win32 ------
1>Performing Makefile project actions
1>NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 9.0\VC\bin\cl.exe"' : return code '0xc0000135'
1>Stop.

The Boot Project has a Makefile.

MSVC16_ROOT = C:\Program Files\Microsoft Visual Studio 9.0\VC # I set the value by myself.
!ifndef MSVC16_ROOT
!error Environment variable MSVC16_ROOT must point to the installation directory of MS Visual C++ 1.5
!endif
ENVPATH = $(PATH);
CC = "$(MSVC16_ROOT)\bin\cl.exe"

Let me know what the problem is.
Thanks.