SONY-TZ135 surround/s + SAMSUNG DB E6100 blue ray

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Guest

Guest
Hey everyone, wondering if you can help.
I have a Sony surround sound this one:-
http://pdf.crse.com/manuals/4272768121.pdf

and have just got this blue ray player:-
http://www.samsung.com/uk/consumer/tv-audio-video/blu-ray-players/blu-ray-players/BD-E6100/XU-support

I have connected the blue ray player via HDMI cable direct to the tv. I thought it would just need a audio cable into the surround sound to get the sound sorted...but nope it doesnt want to work for me!
I also tried awhile ago to set up my freeview box to go through the surround sound and had the same issue. I'm missing something and dont know what it is!

I clicked the "audio in" button on the s/s remote and it just keeps saying Invalid.

Both the b/r and s/s have "coaxial" slots...is that the cable I need to connect them?
So confused!

Thanks in advance!