How I fix the subscription (renew, cancel, upgrade functions) not showing in a page.

I get the following message when I visit a page for update my subscription level

"Your Subscriptions
Your current subscriptions are listed here. You can renew, cancel or upgrade your subscriptions by using the forms below.
PRO
Your membership is set to automatically renew
Upgrade from PRO"

But NO FORMS are showing below this message, how can I enable the form for upgrading a subscription level?

Thanks for help in advance.