Given just this to work with I'd have to write that you need to call up the folk that manage your home network and internet connections.
But you can start at the CNET Networking Forum and the note we have there for Samsung owners at http://forums.cnet.com/7723-7589_102-378511.html?tag=threadListing;forum-threads
I recently purchased a LN55C650 LCD and picked up a WIS09ABGN wireless dongle at Fry's. Setup went smoothly and watched streaming movies on Netflix. Now every time I turn on the TV and try to access the internet I get a "network interference" error. Since going through the setup again clears the error, I do not think it is a router signal strength problem. Lap tops work fine in the same room too. Going through the setup to watch a movie is a PITA. Seems to be a lot of theories about this problem but can anyone tell me the nature of this error? Is the probelm with the TV? Dongle? Software or firmware? Wireless singnal or setting?