Why was the Caterpillar not happy with the poem alice recited?

Alice maintains that she is changing, and doesn't remember things as she used to. To prove this, she tries reciting a famous poem ("How Does the Little Busy Bee"); however, it comes out just as wrongly as the verses in wonderland tend to do, and is full of nonsense and malicious humor. Caterpillar says that she recited the poem alll wrong.