I have a samsung ht-c5200 blu ray 2.1 home theatre tried everything to connect sky+hd box but didnt work used optical cable and hd cable help

SOURCE: Samsung HT-BD2R 7.1 Channel Blu-ray Home Theatre System

If your television has RCA style audio/video output you can use an audio RCA cable (red & white connectors) and simply plug from the 'output' of your television into the auxilliary input on the back of the HT-BD2.

Then select AUX on the HT-BD2 remote, whenever you wish to listen to the television audio.

SOURCE: I have bouight a samsung home theatre system that

You have several ways to do this. You can hdmi cables from the two units and plug them into your tv if it supports hdmi and run the audio out portion on the back of the tv and hook that into one of the audion inputs on the surround unit. Or you run audio directly out of the bluray using rca, digital coax, or digital optical cable. Turn the surround reciever to the corresponding input that you choose to use.