ANSWER:

As i checked telnet on my site on port 80 the Connection failed

C:\Users\IBM User>telnet insigniafleet.insigniabiz.com 80       
Connecting To insigniafleet.insigniabiz.com...Could not open connection to the host, on port 80: Connect failed

As I contacted my Network Service Provider and it turns out that they disabled port 80 from there side few days ago , due to some reasons (which was enable before).

It was working on my home network but not on any other network So now they are working on it and it soon will be enable.