call another html page not working

@kvanaraj,

It depends on where the page exist on the website.  Is edu.html at the root of the web site directory or is it in a subdirectory? for example:
www.mywebsite.com/edu.html
or
www.mywebsite.com/subdirectory_name/edu.html

Also, are you sure that the page name is edu.html (not edu.php)?  Can you get to the page directly?  If so, what is the url that you use?

http://localhost/project1/about.html
this about.html is in same project1 directory