Try rebooting your router first.
If that doesn't work then as this is only happening on the one app, the only other thing to try is factory resetting your box to reset the iPlayer.
If you have recordings though, you will lose these.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
