I solved this (error code 51330) by changing my wireless security mode from WEP to nothing (no security) I realise this is a risk but it worked. The next step is to try WPA. Technically WEP security is insecure anyway as people can easily crack into it if they want!
Other's have posted that changing the wireless mode from G to B + G (mixed) works. Others have also reported that switching your wireless router from 11 to 1 or something else works. For me it was switching to no wireless security that did it.
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