Wireless network Issue on MacBook Pro Duo (original) with Snow Leopard

Hello all,
I have searched the forums and tried many solutions to no avail. I have the original Macbook Pro 2.16 Core Duo running 10.6.6. Here is the problem:
When I am at home, I have moderate trouble with my wireless. My signal/noise is 78 dPm/94 dPm. However, when I am at school my computer cannot even crawl on the internet unless it is in between classes when the network activity is low.
My school is a small grad school of only about 250 people, and 80% of the people in my class have newer Apples. No other person seems to be experiencing my problem. I can watch the people beside me surfing away on newer MacBooks while my connection times out almost every time.
It seems that everyone's connections drown my connection out. However, nobody else is experiencing my problem. It is if I am the last kid in the lunch line and nothing is left for me.
If there is any more information I need to provide, please do not hesitate to ask. Any help will be greatly appreciated! Thanks!

"when I am at school my computer cannot even crawl on the internet unless it is in between classes when the network activity is low."
Make sure you are on the correct network if you have not already done so.
Repair permissions and restart your computer. If your computer has been in "sleep" mode for a few days, restart it. You really should restart your computer at least _"once a day"_ to refresh it.
"I have attempted to use the Airport Utility, *however, it detects nothing* and will not let me manually configure anything."
Is the light green on the router you are using? Apple has several Airport routers. Which one do you have?
After doing 1 through 5, did you restart your computer afterwards?
===========
See KB Articles: http://support.apple.com/kb/HT1401 *AirPort troubleshooting guide*
http://support.apple.com/kb/HT2712 *Using network locations in Mac OS X*
============================
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
=====================
If using Apple's Airport, you may wish to cross-post over in one of the AirPort Forums.

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