Custom text field not showing

I’ve been trying to display text field but it’s not responding. I’ve copied the code you have in the demo:
[stripe name=”The Awesome Store” description=”The Book of Awesomeness” amount=”1999″]
[stripe_text label=”First Name:” id=”first_name” required=”true”]
[/stripe]

Stripe_text isn’t showing.

Please let me know what might be the issue.

Regards