How are you trying to connect, via Ethernet or Wireless?
The red light indicates that power is OK. The orange light indicates that the Ethernet connection is OK. No green means that the Wireless is not turned on.
If you are trying to connect via wireless have you gone into the router's user interface and turned on the wireless?
To access the web-based utility of the Access Point, launch your web browser. In the Address field, enter the Access Point’s default IP address, 192.168.1.245
The login screen will appear. Leave the User Name field blank. The first time you open the Web-based Utility, use the default password, admin.
Once into the router interface you can set all the parameters necessary to set up your wireless router.
To initially get the green LED to light, you need to go to the Wireless Tab in the Router interface and change the mode option from disabled to mixed.
Here is a link to the User Guide for your router. It will help you to set up your router.