I'm sorry to hear that you're having trouble connecting.
It could be one of two things:
1. The LinkStick could be malfunctioning
2. The router may be timing out early. That's a strong possibility, and a call to your router company many help troubleshoot the issue.
Just got a new Samsung 55" LCD and Linkstick. The Linkstick is working and connects to router but it keeps losing the connection when using Netflix or other streaming source. I use Netflix with my iPad in the same room with no problems. Is there a solution to make it work better?