Server not found error

Hi all,

I facing a different problem with my website. I'm using BSNL ISP and its connected to the computer using linksys router. my website is not opening in my computer which is connected using LAN. Also i tested with Wifi connection its also not working. But Wifi connected to my mobile is working with the site.also if i tether it to p, its working fine.I donno where is the problem.