Ah, you've converted from TiVo > 360, and no longer have a TiVo - you now have a 360 box. You can view pictures of the boxes here - they're completely different software platforms.
Unfortunately, parental control of apps is something currently only available on the TiVo/V6 platform and not on 360.
Edit: @muppet1 to make sure you pick up the moved post, it's now in the 360 board.
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks