Please make sure the you set Admin_EnableStripScriptTags  ="false"  in your web.config.

 

<add name="CEHtmlEditorProvider"
        type="DotNetNuke.HtmlEditor.CEHtmlEditorProvider, DotNetNuke.CEHtmlEditorProvider"
        providerPath="~\Providers\HtmlEditorProviders\CEHtmlEditorProvider\CuteSoft_Client\CuteEditor\"
        UseDNNRootImageDirectory="true"
        RemoveServerNamesFromUrl="true"
        UseRelativeLinks="true"
     RenderRichDropDown="true"
     UseSimpleAmpersand="false"
     CustomCulture=""
     ThemeType="Office2003_BlueTheme"
     DisableAutoFormatting="false"
     BreakElement="div"
     EditorBodyStyle="background-color:#ffffff"
     Admin_AutoConfigure = "Full"
     Admin_SecurityPolicyFile = "admin.config"
     Admin_TemplateItemList = ""
     Admin_DisableItemList = ""
     Admin_AllowPasteHtml  ="true"
     Admin_EditorOnPaste  = "default"
     Admin_ReadOnly = "false"
     Admin_ShowBottomBar ="true"
     Admin_ShowHtmlMode  ="true"
     Admin_ShowPreviewMode  ="true"
     Admin_EnableStripScriptTags  ="false" 
     Admin_EnableContextMenu    = "true"
     Admin_EnableContextMenuEditing  = "true"  
     Admin_EnableContextMenuFormat   = "true"
     Admin_EnableContextMenuInsert  = "true"
     Admin_EnableContextMenuInsertAdvanced  = "true"
     Admin_EnableContextMenuInsertFiles = "true"
     Admin_EnableContextMenuInsertForms = "true"
     Admin_EnableContextMenuRelative = "true"
     Admin_EnableContextMenuTags = "true"
     Admin_EnableContextMenuVerbs = "true"          
     
     Registered_AutoConfigure = "Full"
     Registered_SecurityPolicyFile = "default.config"
     Registered_TemplateItemList = ""
     Registered_DisableItemList = ""
     Registered_AllowPasteHtml  ="true"
     Registered_EditorOnPaste  = "default"
     Registered_ReadOnly = "false"
     Registered_ShowBottomBar ="true"
     Registered_ShowHtmlMode  ="true"
     Registered_ShowPreviewMode  ="true"
     Registered_EnableStripScriptTags  ="false" 
     Registered_EnableContextMenu    ="true" 
     Registered_EnableContextMenuEditing  = "true"  
     Registered_EnableContextMenuFormat   = "true"
     Registered_EnableContextMenuInsert  = "true"
     Registered_EnableContextMenuInsertAdvanced  = "true"
     Registered_EnableContextMenuInsertFiles = "true"
     Registered_EnableContextMenuInsertForms = "true"
     Registered_EnableContextMenuRelative = "true"
     Registered_EnableContextMenuTags = "true"
     Registered_EnableContextMenuVerbs = "true"   
     
     Guest_AutoConfigure = "Minimal"
     Guest_SecurityPolicyFile = "default.config"
     Guest_TemplateItemList = ""
     Guest_DisableItemList = ""
     Guest_AllowPasteHtml  ="true"
     Guest_EditorOnPaste  = "default"
     Guest_ReadOnly = "false"
     Guest_ShowBottomBar ="true"
     Guest_ShowHtmlMode  ="true"
     Guest_ShowPreviewMode  ="true"
     Guest_EnableStripScriptTags  ="false" 
     Guest_EnableContextMenu    ="true"  
     Guest_EnableContextMenuEditing  = "true"  
     Guest_EnableContextMenuFormat   = "true"
     Guest_EnableContextMenuInsert  = "true"
     Guest_EnableContextMenuInsertAdvanced  = "true"
     Guest_EnableContextMenuInsertFiles = "true"
     Guest_EnableContextMenuInsertForms = "true"
     Guest_EnableContextMenuRelative = "true"
     Guest_EnableContextMenuTags = "true"
     Guest_EnableContextMenuVerbs = "true"  
     
    <!--  
     NewRoleName_AutoConfigure = "Full"
     NewRoleName_SecurityPolicyFile = "default.config"
     NewRoleName_TemplateItemList = ""
     NewRoleName_DisableItemList = ""
     NewRoleName_AllowPasteHtml  ="true"
     NewRoleName_EditorOnPaste  = "default"
     NewRoleName_ReadOnly = "false"
     NewRoleName_ShowBottomBar ="true"
     NewRoleName_ShowHtmlMode  ="true"
     NewRoleName_ShowPreviewMode  ="true"
     NewRoleName_EnableStripScriptTags  ="false" 
     NewRoleName_EnableContextMenu    ="true"  
     NewRoleName_EnableContextMenuEditing  = "true"  
     NewRoleName_EnableContextMenuFormat   = "true"
     NewRoleName_EnableContextMenuInsert  = "true"
     NewRoleName_EnableContextMenuInsertAdvanced  = "true"
     NewRoleName_EnableContextMenuInsertFiles = "true"
     NewRoleName_EnableContextMenuInsertForms = "true"
     NewRoleName_EnableContextMenuRelative = "true"
     NewRoleName_EnableContextMenuTags = "true"
     NewRoleName_EnableContextMenuVerbs = "true"  
        />  -->