I can only find one curved soundbar on the Samsung website (well two but the only difference seems to be colour).
I will assume that it is not something silly like you have forgotten to press the SOURCE button on the remote of the soundbar to select HDMI.
In which case it may be the audio format the Blu-Ray player is chucking at the soundbar. Go into the set up of the player and select PCM Stereo as the output format. This is the most basic format and it would be a pi55 poor device that can't understand it.
See if that produces sound then change the format to see what the soundbar supports.
Also try plugging the Blu-Ray direct to the telly and make sure you get sound out of the TV speakers. That will at least prove the player is outputting sound.