Try a factory reset then connect it to your router with Ethernet and try again.
If that fails, call Samsung on how to update it another way. I don't discuss the other ways since it can brick a player.
I cannot access my existing internet channels (Netflix, Pandora) on my BDc5500 because 1. a message breaks in and requires me to update software which 2. will not upload. It gets stuck on Mahjong Fruit or something like that, and will not continue, even when I leave it on for 36 hours. So my blu ray player, which is supposed to give me access to internet, is unusable for all but DVDs.