I recommend taking a look at the network led on the Slingbox. If the network led is lit then supposingly it has a valid IP address and can participate on the network. If the light is blinking then it doesn't have an IP address and is requesting an DHCP address. If the led is off then it doesn't have an IP address and has timed out asking for a DHCP address. If the light is dim then it is possible you have a malfunctioning AC adapater. If the led is missing then you might have gremlins running around loose in your home.