Error after install Android Studio

I tried to install Andriod Studio (new Google IDE) and after launched my app in B4A returns this error:

Parsing code. 0.06
Compiling code. 0.22
Compiling layouts code. 0.02
Generating R file. Error
Cannot find: C:\Android\android-sdk\tools\..\platform-tools\aapt.exe
Please configure paths (Tools - Configure Paths).

The paths are configured correctly and the aapt.exe file is into folder
There is some environment variable to check that used by B4A?

thanks
Alberto