It is not clear from your post what the problem is so please clarify.

You are attempting to register your Sony 3d blu-ray disc player bdp-bx58. How are you attempting to do that, from the player itself or from a computer? If from the player itself have you tried registering at Sony's web site from a computer? has a Registration option at the bottom of the page.

Also at the bottom of that page is Sony's Support options, eg;

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Have you tried their "Chat Now" option?