I think a value is missing for field <i><b>Diplome</b></i>
This might not be the only error. If you are getting some error message, please post it.
You are missing two data fields – “Nom” and “Diplome”, so your value fields don’t match the list of field names.
If you would like to enter only specific columns then use (Nbetudiant, Pass, Prenom , Adress , Tel , Email , Sexe , Fax , Date) before “values”. To provide values for all columns then no need to provide the column names before “values”.