ZXDSL 831 Modem problem

Hello i have ZXDSL 831 the black modem of ZTE. i am unable to use the auto settings for the internet that are installed in modem. I can only use internet when i use the manual settings "Dialing from my computer" By making a bridge connection in modem.

But the auto settings does not work.

There was a problem in exchange and something went wrong. I have gone thru the quick setup many times gave my user password etc. but it just doesn't work at all.

Any one have any idea what to fix here? Cause the helpline guys are .... so weird. They don't know anythign about DSL. i am just so pissed on them

No reply? sigh :|