Wireless Help

My xbox 360 has had a wirless connector attached to it for the last 1 1/2 years through my hd dvd player and has been working fine. I recently unplugged it at the back of the hd dvd for the last 3 weeks for various reasons and when i went to connect tonight it didn't want to work poroperly. the green light (saying its connected to the network) doesn't come on stairght away. Sometimes it will connect in 5secs whilst other times it won't connect at all. If its plugged directly into the console it seems to have a higher chance of working. any ideas.
i want it fixed for the nxe