Unfortunately bbc iplayer has a number of quirks that can at times stop it working. If there are no extra lights flashing on your box, and no one is streaming video or using you internet connection excessively that chances are its just case if iplayer being a swine.
You can't learn anything from a mistake until you admit that you've made it.
I found the apps such as iPlayer to be almost unwatchable on the TiVo as they were so slow and clunky, but they are much better on the V6. In fact, I'm watching the first episode of Troy right now on iPlayer.
I’m on my third TiVo box now, iplayer has been dreadful for a couple weeks now, as has my ‘new’ TiVo box, currently been sitting here for 10 mins & it just says it’s loading????? The TiVo box itself has got me biting cushions in frustration this week with its slowness, black screen inbetween switching from my shows, I’ve rebooted three times, checked my service status says it’s fine, it’s just so rubbish! I am an XL customer of well over 5 years now, paying £80 a month. Aren’t we supposed to be getting the V6 box for free to replace this hunk of metal - please Virgin