I try but not work.
Although as you wrote it is more correct but is not the problem because the insert work. The only problem is with the redirect does not contain the value of the row $row_WADAblogcomm['idarticolo'] that are set in db.
After insert I would like:
blogcomm_Results.php?idarticolo=12 ( 12 is $row_WADAblogcomm['idarticolo'] in db), but I get
blogcomm_Results.php?idarticolo=