Erroraccio! [Server Error]

Server Error in '/' Application.
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 2113:
Line 2114:        Literal lit;
Line 2115:        string[] Testi = ffzManagers.DMPost.StampaPost(PaginaFFZ.IDCOMUNITA, Post, PaginaFFZ.IstanzaCartellaForum, PaginaFFZ);
Line 2116:
Line 2117:        if (Testi[0].Length > 0)


Source File: c:\Inetpub\wwwffz3\Control\Comunita\ListaMessaggiREP.ascx.cs    Line: 2115

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   ffz.BLL.DataManagerPostComunita.StampaPost(Int32 IDCOMUNITA, PostComunita post, CartellaForum cartella, Utente AutoreFFZ, UtenteComunita Autore, FPage PaginaFFZ) in E:\Progetti\FreeForumZone\3.0\www\Progetto\FreeForumZone3\ffz\BLL\DataManagerPostComunita.cs:605
   ffz.BLL.DataManagerPostComunita.StampaPost(Int32 IDCOMUNITA, PostComunita post, CartellaForum cartella, FPage PaginaFFZ) in E:\Progetti\FreeForumZone\3.0\www\Progetto\FreeForumZone3\ffz\BLL\DataManagerPostComunita.cs:881
   Control_Comunita_ListaMessaggiREP.StampaMessaggio(HtmlControl obj) in c:\Inetpub\wwwffz3\Control\Comunita\ListaMessaggiREP.ascx.cs:2115
   Control_Comunita_ListaMessaggiREP.StampaRigaPost(HtmlTableRow tr) in c:\Inetpub\wwwffz3\Control\Comunita\ListaMessaggiREP.ascx.cs:1036
   Control_Comunita_ListaMessaggiREP.AssociaListaPost(List`1 Lista, FPage Pagina, Int32 p) in c:\Inetpub\wwwffz3\Control\Comunita\ListaMessaggiREP.ascx.cs:451
   discussione.AssociaPost() in c:\Inetpub\wwwffz3\discussione.aspx.cs:553
   discussione.Page_Load(Object sender, EventArgs e) in c:\Inetpub\wwwffz3\discussione.aspx.cs:258
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +24
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +57
   System.Web.UI.Control.OnLoad(EventArgs e) +126
   System.Web.UI.Control.LoadRecursive() +100
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2587


Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832