I don’t have those commands in my avast4.ini file and my icons are there in the system tray right next to system clock. Actually I merged VRDB icon and avast! main icon into one…

I think you need to add this line under [VRDB] section as well as under [AAVM] section:
ShowTaskbarIcon=1

Again, I don’t have those lines and my icons are showing properly, so I don’t know is it going to help you in any way…