Error using tree as cell type in a treegrid


I’m trying to create a treegrid but whenever i choose the celltype as “tree” it gives me an error saying



Error type: Configuration
Description: Incorrect cell type: tree



Any clues?


The possible reason for the problem - the dhtmlxtreegrid.js is not included.


Please, check that the file is correctly included.


this is my code




<%@ Page Language=“VB” AutoEventWireup=“false”%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "w3.org/1999/xhtml" class=“crm”>
 
     Untitled Page
    
    
    
    
    
    
  
  



  
  
  
  
  
  
  
  
  



  
  
  
    
    
 
 
 
 
  
  
  
 
 
   


  

Customer Relation Management


 

 
 

  
  
  
  
  
  
  
   Waarschuwing
   Budget
   Geboekte uren
   Verschil
   Hoofdverantwoordelijke
   Definitief
   Voltooid
   Medewerkers
   Opmerkingen   
  
  
 

  
   
  
       

       
       
 





 



 


The dhtmlxTreeGrid is a special component. Its libraries are placed in the dhtmlxTreeGrid/codebase/ folder (not in the dhtmlxTree/codebase/).


The component page is dhtmlx.com/docs/products/dhtmlxTreeGrid/


That did it thanks.!