Can anyone help configure PTCL's ZTE 831d Modem with Linksys WRT160N

I am trying to configure the linksys router with my ZTE 831D modem provided by ptcl. i have tried so many things. the best i got was "Cannot get ip address from PPPoE server"

can anyone help me tell how to configure these.

i hope i didnt wasted my money on that broadband router.