Zyxel 660r 61c ethernet modem, Dlink 1120S Voip gateway and linksys WRT54G

[n6600]

Hi all

I currently have Zyxel 660r 61c ethernet modem, linksys WRT54G and i have set my modem to bridge mode and all the isp username and password are setup in my router.
I would like to put my dlink behind my router but it didn't work as it doesn't support Stun Server

I have no choice to set up my network as below

(bridge mode)Modem ---->(wan) Dlink 1120S (ethernet)---> (internet)Linksys WRT54G (1)--->PC


But it is not working and i have no internet

Please help.

 

[Tmagic650]

Modem to Dlink VoIP gateway (WAN)... Linksys WRT54G to Dlink VoIP gateway (LAN 1)... WRT54G wireless to PC