ERROR:Error 256: Object::__call() Method 'ImageAttachment' not found in class 'Products' At l199 in D:\workspace\projects\silver\sapphire\core\Object.php

class Products extends Page {
      static $db = array(   
      'Industry' => 'Text',
      'Type' => 'Text',
      'Serving' => 'Text',   
      'Info' => 'Text',
      'ReviewsBuzz' => 'Text',
      'Technology' => 'Text',
      'WhatsCooking' => 'Text'      
      );
      
      static $has_one = array(   
       'TitleImage' => 'Image',
    'ThumbnailImage' => 'Image'
    );
      static $has_Many = array(
         'ImageAttachment' => 'ImageAttachment'
      );
    function getCMSFields() {
       $fields = parent::getCMSFields();
      
       $fields->addFieldToTab('Root.Content.Main', new ImageField('TitleImage', 'Title Image'));          
       $fields->addFieldToTab('Root.Content.Main', new TextField('Industry','Industry'));
       $fields->addFieldToTab('Root.Content.Main', new TextField('Type','Type'));
       $fields->addFieldToTab('Root.Content.Main', new TextField('Serving','Serving'));
       $fields->addFieldToTab('Root.Content.Main', new TextareaField('Info','Info'));
       $fields->addFieldToTab('Root.Content.Main', new TextareaField('ReviewsBuzz','Reviews Buzz'));
       $fields->addFieldToTab('Root.Content.Main', new TextareaField('Technology','Technology'));
       $fields->addFieldToTab('Root.Content.Main', new TextareaField('WhatsCooking','Whats Cooking'));
       $fields->addFieldToTab('Root.Content.Main', new ImageField('ThumbnailImage', 'Screen Shot'));
      
       $fields->removeFieldFromTab("Root.Content.Main","Content");
      
       $imagetable = new HasManyComplexTableField(
            $this,
            'ImageAttachment', // relation name
            'ImageAttachment', // object class
            /*array(
             'Link' => 'Link',
             'ImageID' => 'Image'            
       ),
       'getCMSFields_forPopup'*/
            ImageAttachment::$field_names, // fields to show in table
            ImageAttachment::getCMSFields_forPopup(), // form that pops up for edit
            "ProductsID = {$this->ID}" // a filter to only display item associated with this page          
         );
            //$imagetable->setParentClass('Products');
            //$imagetable->setAddTitle( 'A Image' );
            
            $fields->addFieldToTab('Root.Content.RightPanelImage', $imagetable);
            
       return $fields;
      }
   }
   
   class Products_Controller extends Page_Controller{
   
      
      
      
   }

class ImageAttachment extends DataObject {
   static $db = array(
   'Link' => 'Text'
   );
   static $has_one = array(   
   'Image' => 'Image',
   'Products' => 'Products'
   );
   
   static $field_names = array('Link' => 'Link');
   
   function getCMSFields_forPopup() {
      $fields = new FieldSet();
      $fields->push(new TextField('Link', 'Link'));      
      $fields->push(new ImageField('Image', 'Image'));
      
      return $fields;
   }
}