I have the same issue of the chatbox not appearing on the CPMS homepage, which is one level above my forum URL. Im using VB 3.7.3 PL1; MGC Evo 1.0.0, VBadvanced CPMS 3.0.1. and v1.7 of this module.
The above instructions described with "Adding .." and "after this,," are too vague for me to understand. Please use whole sentences and tell us what steps to perform so that the box appears on the homepage.
Yes I have the right "No"/"Yes" combo in the MGC Evo settings

and have adv_index in the box.
Thanks