SharePoint Webapplication issues using Kerberos authentication

Hi ,

I have configured SharePoint 2010 farm (one sharepoint server and one database server) with kerberos authentication , and i have successfully created new web application from sharepoint central administration with kerberos authentication , but if i attach any old content database to my web application its not working. I am getting 404 error.

Please help/suggest me to resolve this issue , Thanks in advance.

Regards,
Uday.