Pivot Table from ods files

Pivot Table from ods files

Hi,
 
have just imported an ods spreadsheet with pivot tables and chart into Zoho. The pivot sheets displayed but don't update when data are changed in the source table. Also did not find anywhere how the piovot table and charts could be edited.
 
Sorry if this is a consequence of my lack of experience with Zoho but i did not find answers on this forum although a number of posts relte to pivot tables.
 
Thans and regards,
 
Olivier