I have the same modem. This is the process if you have not changed the default values.
1: Go to the start menu and click "run".
2: type in "ipconfig" and press enter. Take note of the "IP Adress", this is your local adress as your modem acts as a router as well. We'll use this number later.
2: Go into your internet browser and type "192.168.1.1"* into the address bar and hit enter
2: The default user name is "admin" and the password is "password"
3: Click "Advanced settings"
4: Click "Post fowarding"
5: Enter "6881"** into the "Public Port - Start", "Public Port - End" and "Private Port" fields. Select the "TCP" button. Enter your computer's local IP address (the one we got from the command prompt) into the "Host IP Address" and click Add.
6: Repeap step 5, but select UDP instead of TCP.
7: After adding both those ports, select "Save Settings and Reboot" from the side bar. The modem will restart and bittorent should work alot faster.
* If this doesn't work the correct number can be found in the Ipconfig dialogue as "Default Gateway"
** This is the default port, if you have changed it in the azureus config, just use that number.