well you need to reset your router wireless config, your isp dont do this, you need to config yourself, but i give some help. try these manual steps:
4.1 Log on the webpages
Open your Internet Browser
in the address field
Click on GO
• The following webpage will be displayed
The only default language is English.
To access the required webpage, click on the corresponding tab on
the left side of the page.
Webpages’ menu structure
The table below describes the menu tree of the webpages.
4.3 ADSL/Internet Settings webpages
4.3.1 ADSL status
Click on "ADSL Status" which is located on the left side of the screen.
SET UP WIZARD
The ADSL Wireless Base Station also operates as a wireless access
point, allowing wireless computers to communicate with each other. To
configure this function, you need to enable the wireless function, define
the radio channel, the domain identifier, and the security options.
Check Enable and click "SAVE SETTINGS".
You must specify a common radio channel and SSID (Service Set ID) to
be used by the ADSL Wireless Base Station and all of its wireless clients.
Make sure you configure all of its clients to the same values.
Access Control allows users to define the outgoing traffic permitted or
not-permitted through the WAN interface. The default is to permit all
If the signal strength of a single wireless base station is not sufficient due
to a large coverage area or attenuation due to walls, with WDS the
range of a wireless base station can be extended.
All base stations in a Wireless Distribution System must be configured
with the same radio channel, and encryption type (WEP/WPA) if that is
i send a link for these steps more datailed on: