Looks like I'm not the only one with this problem, but I didn't see any solutions.
I installed this plugin so I could have more control over my Subscribe2 widget. Unfortunately, if I include it in a sidebar, enter my email address, and hit "subscribe," although I get a confirmation message on the page telling me to check my email, no email is sent.
If I also include the default Subscribe2 widget in the sidebar, and submit information via the Subscribe2 Widget Pro widget, then upon submission, the email is sent properly.
Additionally, if I use just the Subscribe2 default widget, I have no problems.
But if this widget is used by itself, it doesn't send the confirmation email.
Any help would be appreciated. I'll be out of town this weekend, and thus unable to respond to posts, but I'll check again next Monday.