ASP.NET application access when using ip and host name

Question

Hi All,
I am able to access asp.net application when using the IP of the server i.e http://10.10.10.10/test/test.aspx, this url when used popups a login box asking for username and password. When i enter the details it takes me to the next page.
But when  i use hostname instead of IP as above i.e http://HOST-NAME/test/test.aspx, again it popups the login box which when i enters the correct details it popups the box again and again.
This behaviour happens only in IE bu works properly in firefox.

Any Solution??