Hmm,you can try to: (btw I copied and pasted this from another site

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-Attempt to connect at a later time. You can also check our alert to see if there is a service outage on the PlayStation®Network.
-Launch the Internet Browser on the PS3 and check if there is a message from your Internet Service Provider. If there is, follow the instructions to set up your Internet Service. You may need to contact your ISP for assistance