Q: weak internet strength!!

Your problem could be many things like the router, proximity to the router. What it is not is your airport.

Which os is installed on your computer?

How are you connected to the internet?

Change your router channel.  Sometimes this is all you will have to do.

Power cycling the router.  Read the router's user manual or contact their tech support for instructions.

System Preferences/Internet & Network/Network

Unlock the padlock

Locations:  Automatic

Highlight Airport

Click the Assist Me button

In the popup window click the Diagnostic button.

System Preferences/Network- Unlock padlock.  Highlight Airport.  Network Name-select your name.  Click on the Advanced button.  Airport/Preferred Networks-delete all that is not your network.

Place a check mark next to "Remember networks this computer has joined."  Click the OK button and lock the padlock.  Restart your computer.

http://support.apple.com/kb/TS1920 Mac OS: How to release and renew a DHCP lease

No internet connection (wireless)

Check to see if an extra entry is present in the DNS Tab for your wireless connection (System Preferences/Network/Airport/Advanced/DNS).

Delete all extra entries that you find.

Place a check mark next to "Remember networks this computer has joined."

Other resources to check into:

http://www.netspotapp.comNetspot

How to diagnose and resolve Wi-Fi slow-downs

Pv6 troubleshooting

What Affects Wireless Internet?

Solutions for connecting to the Internet, setting up a small network, and troubleshooting

You could also try using something like this.

You have one of these?

Yep, before I got it I was getting terrible reception and my internet was constantly disconnecting.