Wireless Security was enabled on your robot so that you could connect to the competition field network without having to worry about malicious interference from other wireless devices. You'll have to disable it in order to connect to your own wireless router. (You could also manage to set your wireless router to have the same security settings, but you probably don't know the WPA key that was used.)
To reset things to the way they were before you shipped your robot, plug your wireless bridge directly into your router, log in to it at address
http://10.31.33.1/ with userid
admin and password
admin, go to the Basic Wireless page, and set the Wireless Security Mode to
None. (I'm not absolutely certain that the userid is correct for the newer wireless bridge received by rookie teams. Check your control system documentation to make sure.)