There is a major problem with your post. Suppose for instance I asked you how to solve a mathematical problem. I'm not going to tell you the contents of the problem, but I am going to tell you that I have part of it solved and I want you to start from there. As obvious as it is, you probably would not be able to answer the question without the problem that I started from.
To bring this little scenario to a conclusion, you have not said one word about what flashcart you are using, any of the things that you have done to check if the problem is indeed because of a certain part of your setup or just a normal error, thus I can only give you random speculations for random flashcarts and hope that one of them is correct.