I have shifted from Airtel Broadband connection to TATA Indictom. I am using the old modem, Beetel 450TC1 ADSL2+ROUTER. I am able to connect to internet using LAN chord connected from my Laptop to modem but not able to connect to WIFI. Whenever I tries to connect to wifi it is asking for username and password. I guess the WIFI modem settings are not correct.
I am not able to change Authentication type in Multiple SSID settings in wireless settings of mode.

I am attaching the screenshot of internet, LAN and wireless modem settings and pop-up box which I got when trying to connect to wifi using laptop.

Attachment 12349Attachment 12350Attachment 12351Attachment 12352

Please help me fixing this.