problem don't generated code-completion

[prevert]

hello,
by following the steps of the tutorial e-commerce,
in netbeans 7.1.1 it doesn't generates me code-completion
I'don't know the cause of that problem
here is the link for the unit of the tuto :

http://netbeans.org/kb/docs/javaee/ecommerce/connect-db.html

here is my case :



here is the capture from the tutorial :



do you have any idea


thank you