do you have reseted the box?
otherwise you could install openwrt, format the hd and go back to asus firmware.
http://wl700g.homelinux.net/drupal/?q=node/24 --> and the second step.
go back to asus:
http://wl700g.homelinux.net/drupal/?q=node/54
i don't know any better solution.
grat182