Thanks very much!
Now onto a problem....
1. I have the Sandbox account setup.
2. I have a certificate from the account
3. I have entered the absolute path to the certificate in the config page for WPP
When I run a test, I get a message saying that the username/password is invalid.
I have the debug mode and when I look at the code that I receive in the email I see that no username or password is being sent to PayPal.
Has anyone encountered this problem? If so, how did you fix it?