I clicked on search for access point, it beeps, and shows netgear with lock highlighted in red and thomson with lock highlighted in green. i click on the green one and it says WEP security type and prompts me for a password or key. What is this? I have a cable modem downstairs that's directly connected to my computer and a wireless thing that receives a signal in my sister's room upstair's for her pc. what password or key am I supposed to type in? how do I find out what it is?