google apps script <-> google cloud sql

Hi,
first of all i try to get/put some data from google spreadsheet into
google cloud sql.
For that i found some useful link (i use the first example for my
question):
https://developers.google.com/apps-script/jdbc_overview
for the jdbc connection i use:
var conn = Jdbc.getConnection("jdbc:google:rdbms://Instance/
name_database","root", "root");
If i run the script i get this error message:
TypeError: Cannot call method "setAutoCommit" of null.
Can anyone help me with that? Do i have some additional settings in
https://code.google.com/apis/console
Thx for your help