I don't know the radio
but would suspect anything "consumer sized" with an internal antenna
just isn't going to pick up long range marine
broadcasts. And using a BFO instead of having dedicated SSB reception
modes will just make life harder.
When you talk about a "4045 band" instead of "The four megahertz band" it also may put people off, as it means you're quit possibly needing to start from scratch.
Just because someone is broadcasting, doesn't mean you can receive them. If your radio
is adequate, and your antenna is adequate, and you understand the basics of the whole setup...Otherwise, I'd try to go to a local radio shop for some hands-on help. They may also just tell you to "get a real radio" instead of a consumer/home market one that's really designed for things like listening to the VOA and BBC Overseas services.