This router was checked by your staff which could connect to the internet. 
 

The situation is as follow:

1. I connect the router through Lan Wire from modem. An orange light is on which the WAN plot is unplugged. 

2. I connect another router(1) through Lan Wire from modem. And connect another Lan wire to C60 router from router (1). C60 router can connect to the internet. 
 

Any special settings should i make in order to connect to the internet for situation (1). Thank you