DIGITAL PROGRAMME SORTING function became inactive. WHY?

[mariussebi]

hi, please help me!
49x8505b own a Sony TV after connecting the digital operator and activating the AUTO TUNING DIGITAL I can not / inactive TV channels sorting function. DIGITAL PROGRAMME SORTING function became inactive. WHY?
As TV programs manage to sit my personal liking and not as it is now sitting in the preferences digital operator.
thank you in advance and I answer to my problem.