I honestly don't know what to say, Patti, because when I've clicked on "Notify of replies" in this topic, I've been getting the Notify page with the question "Do you want a notification E-mail if someone replies to this topic?" and the "Yes - No" links.
But as far as not receiving any e-mail notifications goes, you might recall that you never received your confirmation e-mail with your password when you registered with the forum. Combine that with the fact that you're also not receiving notifications, and I suppose it means that for whatever reason Superlink isn't accepting e-mail from the forum. Sorry.
The only thing I can say is try to contact Superlink's postmaster. The e-mail address is most likely
postmaster@superlink.net (but you might want to check Superlink's homepage just to be sure.
I received absolutely no satisfaction when I contacted AOL's postmaster, but one would hope that you might have better luck with Superlink.