i used to develope in the  3.3.7 version ,now i'm with 4.3.7.

Something strange happened to me ,i have code to switch controlls in a page:

Dim moduleControl As Entities.Modules.PortalModuleBase

Dim s As String

 If Request.Params("Opr") = "Add" Then

       s = "AddProperty.ascx"

ElseIf Request.Params("Opr") = "Upd" Then

      s = "UpdateProperty.ascx"

Else

       s = "PropertyList.ascx"

End If

' Add Plant Model Control to the page

moduleControl = CType(Page.LoadControl(Me.ModulePath & s), Entities.Modules.PortalModuleBase)

moduleControl.ModuleConfiguration = Me.ModuleConfiguration

pnlModuleView.Controls.Add(moduleControl)

thanks for your replay,but i didn't understand what should i do...

where i find this dnn manifest file ?

what are the steps i should take?