sending email for bursting not working

Hi .

I create the Bursting process for an user.

In the first step i created the query bursting in the data model :

In particulary the parameters for my the Bursting query :

SELECT
MANAGER_ASSET KEY, -- Split by
'XXSOG RICEZIONI DA ISPEZIONARE M ASSET' TEMPLATE, -- Catalog
:xdo_user_report_locale LOCALE, -- English (es)
'HTML' OUTPUT_FORMAT, -- PDF,HTML,CSV,RTF,EXCEL
'EMAIL' DEL_CHANNEL, -- EMAIL/FAX/FTP/FILE/SFTP/PRINT/WEBDAV
'XXSOG RICEZIONI DA ISPEZIONARE M ASSET', -- Output Name
'email' parameter1, -- To --EMAIL_ADDRESS
'' parameter2, -- cc
'noreply@oracle.com' parameter3, -- From