Hi Candy.
I'm currently looking for an agent for my new novel. But I won't take just anyone. They have to be recognised and have a solid background.
It sounds to me that your agents is sitting back and letting you do all the hard work.
I think there is lack of communication between the two of you. You need to talk to the agent, define the lines to what you expect. Tell him how much recognition you have as an author.
I think already having the book self-published may give you problems. Agents and publisher alike, want new material. You could pitch the published book, later, once you have another title published mainstream.
I have two book self-published, although I would love to get my novel re-published through a mainstream publisher, I'm currently submitting a new novel to agents and publishers.
Once I get an agent, I expect a lot of hard work, but still, it's the agents job to find a publisher for your title. If not, you need to rethink.... Maybe the book isn't original, maybe it's because it's already published.
If you have any more books under the table, I think it's time to dust them off.
That's as honest as I can be, Candy.
I wish you the best.