Pay Per View Redirect After Payment Page ID Error

After payment confirmation with the Pay Per View plugin, I am not being redirected correctly.

The page id of the PPV page is 707, so after payment confirmation, it should redirect to “domain.com/p?=707”.

Instead, it is being redirected to “domain.com/707”, which results in a 404 error.

I have custom permalinks, am running the latest version of WP (3.4.2), and using the PayPal sandbox.

Anybody else experience anything like this?