javascript - can't load database in dhtmlxgantt php -


I have a problem with my project, the data in the database can not be shown in the Ganttchar dhmtx

This is my code Code in .php 

  & lt ;? Includes Php ('../../codebase/connector/gantt_connector.php'); $ Race = mysql_connect ("localhost", "root", ""); mysql_select_db ("gant"); $ gantt = new JSongantt Connector ($ res); $ Gantt- & gt; Render_link ("gantt_links", "id", "source", target, type "); $ gantt- & gt; render_ table (" schedule "," id ", metral," cut_name "," po_num "," start_date, duration ";);;>    
 
 
 You are using the strange set of Render_table The parameters for this should be render_table (table, id, field)  
  $ gantt- & gt; render_table (/ * table * / "schedule", / * id * / "id", / * Field * / "start_date, duration, matral, custom_name, po_num");

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