Welcome to our forums and thank you for your post. I'm sorry that you've been experiencing problems with some of your recordings.
Have you managed to resolve this since your post? If not, have you tried switching your box off and on again.
If this hasn't helped, I'd like you to try manually connecting to the network by following these steps: press Home on your remote > select Help & Settings > select Settings > select Network > select Connect to the Virgin Media Service now.