Tip: If it's possible to carry a tileset-specific sprite (such as a Buzzy Beetle or Bob-omb) through a pipe, make sure it has the correct graphics and sprite palette on the other side!
Try to provide a little more detail on the problem. AddmusicM is known for being very difficult to work with and it generally crashes over a lot of small, stupid things. Any sort of details you can give on how you went about inserting the music, the freespace you used in the patch, exactly WHAT the error is when you boot up the ROM, etc. would be useful in helping us find a solution for you.
1 
