404 error on IE only other browsers work fine

I have a wordpress Multisite installed on IIS so i have a web.config file not the regular .htaccess .
How ever my problem is my site loads fine on all the browsers except for IE.
On IE the home page loads fine but when i click on the link for other pages it loads the page first and then suddenly gives the http 404 not found.
eg:- https://www.mysite.com loads fine in IE but https://mysite.com does not load and gives http 404 not found.
also the links generated for all the internal pages ar without www so they just load for a second and then gives the 404 error