PNG files behave like templates. There are three files pre-installed, Blank.png, Lines.png and Squares.png. Once you open them the iLiad creates a new .png and saves it under a new name, like Blank_2009-02-05__20-38.png, but in the same directory as the template. As the template is on internal memory on your device, notes are saved there.
Just move all notes files from the internal memory to the CF/MMC/USB and open one of the .png files (Blank, Lines or Squares) once. This way the iLiad recognizes it as the last read document and will open that template the next time. Everything should be ok then.
Actually, the iLiad only follows it's simple programming. I think you have found the only thinkable way to get stuck (not offending!) Kind of an unlucky start, but I hope this doesn't affect your relation to your reader
