Chem3D 15.1 and Gaussian 09W

I have ChemBioOffice 15.1 and Gaussian 09W installed on Windows 7 x64.
I have checked a checkbox "Always display interface to... even if calculation engine is not present" under File -> Preferences -> General.
But I still do not see "Gaussian intreface" under Calculation menu.
How can I turn it on?
Actually I don't even need to run Gaussian from Chem3D, I only need to generate the job files for Gaussian.