I’ve been having the same problem. Trying to copy and paste the code from paypal into my text widget. I’ve follwed the guide by the letter–as far as I can see–and it still shows as html on my webpage, not as a button and drop down list with prices.
I’ve also had trouble with the “email” tab on paypal (for the email code, instead of website code as the guide suggests). It doesn’t show up. Do I need to use a different browser.