Firstly, thanks for Ubuntuseekers who help me to solve this problem. It seemed to be Hardy Heron had a major problem with the Wireless Devices Drivers. So, this time I will post some tutorial to repair the Wireless Problem at Ubuntu (for D-LINK DWL-G112 or G122 ONLY). And you’re also need to edit some text files. So, follow the step…

1. Make sure the wireless adapter are connected to your computer

2. Open your terminal.
Enter this sudo :” sudo gedit /etc/network/interfaces

3. A text window are appear. Clear all the text on that window. Then, copy and paste the following text at that window:

# This file describes the network interfaces available on your system
# and how to activate them.

# The loopback network interface auto lo iface lo inet loopback

# This is a list of hotpluggable network interfaces.

# They will be activated automatically by the hotplug subsystem.

# iface eth0 inet dhcp

auto rausb0

iface rausb0 inet dhcp pre-up ifconfig rausb0 up
pre-up ifconfig rausb0 down
pre-up iwconfig rausb0 essid {your ESSID}
pre-up iwconfig rausb0 key {your WEP key}
pre-up dhclient rausb0

4. Save it.

5. At terminal, enter sudo reboot

Just for a note that I can’t guarantee this code will works, but it works with my Ubuntu and my D-LINK DWL-G122.
Special thanks to Ubuntuseekers who help me finding the answer.

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