When to use the VOUS form of the verb?

Question

I don't understand why in this lesson the example is given i.e. the ez is dropped from the verb
 
-Donne-moi les fleurs!
-Give me the flowers!
However, I have been marked as incorrect by doing what seems to be the exact same thing.
 
Make this statement into an order : "Vous me donnez les fleurs": ________ les fleurs!imperative
·         Donnez-moi RIGHT
·         Donne-moi WRONG
Is this a mistake on your part or am I missing something here?

Accepted Answer

Hi Ian,
If I have understood your question correctly you are querying why it is -
Donne-moi les fleurs ! in the lesson example
and
Donnez-moi les fleurs !
in the quiz question?
If this is the case in the body of the lesson : 
The example was -

-Tu me donnes les fleurs?
-Non.-Donne-moi les fleurs!
Someone you address using the 'tu' form.
But in the quiz question, it was to someone you say 'vous' to.
Hope this sheds some light, let me know if not.
Bonne Continuation !