I've moved your post to a new thread, hope @Jodi_S doesn't mind but there's a few things in here I'd like to check too...
Firstly, I for one am assuming, but you've not said, are you using a 360 box? The previous thread you added to was regarding mainly V6s, but you've said you've just had the box installed which would suggest a 360 to me. The only V6's currently being installed are fault replacements & swaps from TiVo. Can you check here and confirm?
Secondly, both the V6 & 360 get their internet connection via your homehub, and if you've just had a new box installed, there's a very strong chance that problems with OnDemand, streaming apps or such like are related to the 'net connection not being setup. A further assumption would be that you're using wireless, because an Ethernet cable would need physically connecting. Again - if you are using wireless, then the process for reconnecting differs slightly between the 360 & V6 as this is a software process.
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