|Since you have given us exactly no details of what you have hooked up and how you hooked it we cannot begin to guess what you may or may not have done wrong.|
Begin with your Internet service. Is it cable or ADSL? Have you connected and configured the wireless router using a wired PC to confirm it is getting through to internet? Have you configured the wireless interface and what if any security encryption protocol did you use? When you turn on the Sylvania device can it detect your wireless network?
Establishing a wireless network requires all settings to be 100% correct in both router and client device or you don't get connection. Without a detailed description of your efforts to date we have little prospect of helping you effectively.
Goin' Fishin' (Some day)