SQL Query Error (SELECT 
              b.*, 
              i.description, 
              i.name, 
              b.count*im.price as total_price,
              i.id as i_id,
              i.ref_image3,
              im.price as price,
              im.ref_image2,
              pg.is_download,
              i.ref_category
           FROM 
              basket_items b, 
              items i              
           LEFT JOIN item_modifications im ON (im.id=b.im_id)
           LEFT JOIN property_groups pg ON pg.id=im.ref_group
           WHERE 
              b.ref_customer_session='457c2200b3' AND 
              i.id=b.ref_item 
           GROUP BY b.id   
           ORDER BY id) : Unknown column 'b.im_id' in 'on clause'