Hello and Welcome to Free PC Help Ping.
I am no expert at Networking but I think that the setting can be changed on your Router's configuration page. To access the page, open a web browser such as Mozilla Firefox or Internet Explorer and type in
192.168.2.1 in the address bar. This will let you access the web-based management user interface of the Router using the Internet browser on a computer physically connected to the Router.
The Router ships with no password entered. In the login screen, leave the password blank and click the
Submit button to log in.
From there, change the appropriate setting to disable the WEP code on your Router. A set of more detailed instructions might be provided in the manual so you might want to refer them if my instructions seem vague.
Hope that helps. Good Luck.
-- Goku