How to enable anonymous access to document library in SharePoint 2013?

Hi,

I am trying to set anonymous access for a document library(pages library) pragmatically in sharepoint 2013. I used the below code to set anonymous access 

public void SetAnonymousPermissionToSPListArray(SPWeb web, SPList list)
        {
            try
            {
                //Execute the statements with FullControl rights
                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    using (SPSite elevatedSite = new SPSite(web.Site.ID))
                    {
                        SPWeb elevatedWeb = elevatedSite.OpenWeb(web.ID);
                        elevatedWeb.AllowUnsafeUpdates = true;

                        //Set anonymous access for the current site
                        if (web.AnonymousState != SPWeb.WebAnonymousState.On)
                        {
                            web.AnonymousState = SPWeb.WebAnonymousState.On;
                            web.AnonymousPermMask64 = SPBasePermissions.ViewListItems | SPBasePermissions.ViewVersions | SPBasePermissions.Open | SPBasePermissions.ViewPages;
                            web.Update();
                        }
                        list.BreakRoleInheritance(true);
                    list.AllowEveryoneViewItems = true;
                    list.AnonymousPermMask64 = SPBasePermissions.ViewListItems;
                    list.Update();
                    }
                });
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

The document library was set with anonymous acess .But when i try to access the pages inside that library from my extranet site,it is redirecting to login page.But already i have the create webapplication with anonymous access.

If i do this through UI, i am able to access the anonymous page. what i am missing in the code.Kindly help me in this.

Thanks & Regards,

J.Akila