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Make sure that you have the distinction between UPPER CASE and lower-case observed and entered correctly when entering the security code on your Samsung player. A slight error like that can make the security code unusable and disallow access to wireless.
Spell it all out very carefully.
See if it works that way.
If not, let me know, please, as to what other devices work with your WiFi. And, the router box's maker and model # ***** you can find that out, also.