Cannot compile simulink model even after install compiler

I am running 64bit Matlab R2013 on Windows 7. I have downloaded and installed Windows SDK 7.1. It is installed to C:\Program Files (x86)\Microsoft Visual Studio 10.0\

I have set up the compiler in Matlab by typing mex -setup

it was able to locate my compiler and I followed the steps and finished installation.

However, when I tried to run my simulink model "simOrbithw3.mdl", it prompted the following sentences:

Making simulation target "simOrbithw3_sfun", ...

'simOrbithw3_sfun.bat' is not recognized as an internal or external command, operable program or batch file.

I know these lines appear when the compiler is not set up but I have my compiler ready. Why am I still getting this? How to fix this problem?

I am thinking that my Matlab is 64 bit, but the compiler is installed to 32 bit program files folders; might that be the reason? But that is the default setup from Window SDK 7.1 installer and I didn't change anything..