I'm struggling for days with installation of DNN7 in IIS7 in windows 7, but i did have the installation form and everything was installed, but at the end i (after redirection) i had the following Error form :

so i here is the content of my log file :

2015-11-06 22:15:16,588 [CarterNolan-PC][Thread:46][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.NullReferenceException: Object reference not set to an instance of an object.
at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
at DotNetNuke.Framework.DefaultPage.InitializePage()
at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
at System.Web.UI.Control.InitRecursive(Control namingContainer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2015-11-06 22:15:16,602 [CarterNolan-PC][Thread:46][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?error=An unexpected error has occurred&content=0
System.NullReferenceException: Object reference not set to an instance of an object.
at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
at DotNetNuke.Framework.DefaultPage.InitializePage()
at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
at System.Web.UI.Control.InitRecursive(Control namingContainer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2015-11-06 22:15:16,630 [CarterNolan-PC][Thread:37][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.NullReferenceException: Object reference not set to an instance of an object.
at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
at DotNetNuke.Framework.DefaultPage.InitializePage()
at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
at System.Web.UI.Control.InitRecursive(Control namingContainer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2015-11-06 22:15:16,631 [CarterNolan-PC][Thread:37][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?error=terminate
System.NullReferenceException: Object reference not set to an instance of an object.
at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
at DotNetNuke.Framework.DefaultPage.InitializePage()
at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
at System.Web.UI.Control.InitRecursive(Control namingContainer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2015-11-06 22:15:16,647 [CarterNolan-PC][Thread:37][ERROR] DotNetNuke.Services.Exceptions.Exceptions - DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at DotNetNuke.Entities.Portals.PortalSettingsController.ConfigureActiveTab(PortalSettings portalSettings)
at DotNetNuke.Framework.DefaultPage.InitializePage()
at DotNetNuke.Framework.DefaultPage.OnInit(EventArgs e)
at System.Web.UI.Control.InitRecursive(Control namingContainer)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
--- End of inner exception stack trace ---