unable to run accelerated simulation after matlab update

I recently updated my matlab to 2013b. However, the accelerated simulation of Simulink does not work any more. The error is: ### Building the Accelerator target for model: Level1 Setting environment for using Microsoft Visual Studio 2010 x86 tools.

Microsoft (R) Program Maintenance Utility Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved.

### Compiling Level1_acc.c C:\PROGRA~2\MATLAB\R2013b\bin\mex -c -win32 OPTIMFLAGS="/Od /Oy- /DNDEBUG" -f "C:\PROGRA~2\MATLAB\R2013b\bin\win32\mexopts\msvc100opts.bat" Level1_acc.c Level1_acc.c Level1_acc.c(2) : fatal error C1083: Cannot open include file: 'math.h': No such file or directory

C:\PROGRA~2\MATLAB\R2013B\BIN\MEX.PL: Error: Compile of 'Level1_acc.c' failed.

NMAKE : fatal error U1077: 'C:\PROGRA~2\MATLAB\R2013b\bin\mex.BAT' : return code '0xffffffff' Stop. The make command returned an error of 2 'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command, operable program or batch file.

The normal simulation works fine. And I installed a 32-bit version on 64-bit windows system.