Steve,
It's safe to say you're looking at a setup issue with your receiver. If the subs work with movies, they work (the little critters are incapable of opinions on music vs. movies). Something definitely changed in the setup between the old subs and new ones. Not very helpful, I know, but at least you know where to look. I'm not familiar with your receiver, but you should double-check your setup there, and if you have a link to a manual, post that so we can take a look.
-Robb
It's safe to say you're looking at a setup issue with your receiver. If the subs work with movies, they work (the little critters are incapable of opinions on music vs. movies). Something definitely changed in the setup between the old subs and new ones. Not very helpful, I know, but at least you know where to look. I'm not familiar with your receiver, but you should double-check your setup there, and if you have a link to a manual, post that so we can take a look.
-Robb