Problem Fixed
I haven’t been able to use the wireless internet properly on my airport extreme card since I brought it three months ago. It had a very low interception range and it needed to be in the line of sight. But now its fixed! I told my brother about it and he found this webpage and sent it to me. The problem was that the antenna wasn’t connected properly onto my airport extreme card. So that is fixed. But then I have another problem now: the computer keeps self-assigning its IP address everytime I use the laptop. But I think that should be easy to fix.
Now that my wireless connection is up and running, I can even sit on the grassy patchy area at uni and use my laptop at the same time!