Active forum error: Object reference not set to an instance of an object.

Mar 22, 2014 at 1:51 PM
Hello,
After I click on "Add new topic" and when I try to open control panel, I receive the error below...My forum doesn't work since one month.
Any help is apreciated.
thank you
I have dnn 7.2.2 and activeforum 5.2


2014-03-22 11:01:32,836 [Shwn-PC][Thread:31][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.NullReferenceException: Object reference not set to an instance of an object
in DotNetNuke.Modules.ActiveForums.Controls.Callback.OnLoad(EventArgs e)
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2014-03-22 11:01:32,887 [Shwn-PC][Thread:31][ERROR] DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=335&error=Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.
in DotNetNuke.Modules.ActiveForums.Controls.Callback.OnLoad(EventArgs e)
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Control.LoadRecursive()
in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)