My modem dlink dsl-500t router modem. n wireless prolink wgr 1004 router.

the problem . before this i used a dlink wireless outer... everything worked great.

but now... my dlink w.router gone already. so i bought this prolink. wireless network connection is okay. but all of the pcs cannot surf the web. cannot access internet. i tried disabling the dhcp function in the wireless router [ based on the guide pinned in this forum ]. but still no results. help please.