Hi,
your post does not gives much info to help you... so lets do some quick questions...
1- Were you able to connect to the internet with this device prior to "securing" the unit?
2- If not. did you go to the internet configuration page on the router pages... you need to configure the device to connect to the internet and this configuration depends on your ISP. You need to connect the modem they give you and then user proper authentication scheme.
You are half way through...
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cloon_