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Make sure your mane file is .png and that it is set to .png in your coding file.
I see your possible problem. Your mane file is named "preset_7mane.png" Rename it to just "preset_7mane" and see what that does.
It's no problem at all! I'm just sorry I can't be more helpful. xD But have you tried reexporting the mane from your art program?