At first when I installed ubuntu, I didn't have my wireless drivers. So then I installed my Broadcom wireless 43xx drivers. Then I got the enable wireless option. After I enabled it, I could see my neighbor's networks, but not my own. I can still use it through the ethernet cable, but it gets annoying. I can see it whenever I use windows. Along with that, some of the ethernet cables I use at school don't work while they work with my windows installation. What can I do to fix these problems?