It looks like you are both using the custom skin "skin.aeon.nox" - I have downloaded this and had a look. I think the problem is that you are not using the default confluence skin, and therefor the way in which "skin.aeon.nox" works is not the same - so your onload commands need to be compatible with that skin - I guess this will be the same for each other skin that does not implement all of confluence. In this case you will need:
This is due to "skin.aeon.nox" not having the ActivateTvTunes value in it's settings - so you are checking for something that does not exist.
Please let me know if this solves your problems