Hey Rodney, sorry for the problem. First off, it’s important to understand that “sequential” playback has nothing to do with filenames. It’s the order of the actual file indexes (the order they appear on the physical SD card itself). You can control this by formatting the microSD and then copying folders in the order you want them to appear. Just don’t forget to include /00system.
It’s worth noting that there are two other methods of controlling the playback order of folders covered in this thread.
Now, as to why your folders aren’t playing at all — I’m really curious myself! A folder can’t start with ’00’ but it doesn’t look like yours do. I don’t think the underlines would cause a problem… hm. Can you zip up your root and email it to jeremy at this domain?