Probably because you have a pin set up on your system as parental control. You can remove this using Services/settings. If you google how do I get rid on the PIN on my skybox it will give you the full process
Thank you - just worried in case I was racking up charges - I'm late very late Eccles - People on AB have tried to help me but being the dolt that I am I couldn't do it so have just left it :-(