Loading a image with libwiisprite

Good morning. If someone can help, I am having a problem to load a single image with the libwiisprite.
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The above link leads to a topic that shows the problem that I am facing.
If you can help I will be grateful.
Thanks for your attention and have a good day.

The topic can be closed, I found the solution ^^ It was just a compatibility problem, I downloaded the 1.5.4libpng, while the devkitpro was built with libpng 1.4.1. And so, just changing the libs files, we have the problem solved. If you face a similar problem, my e-mail is: artenesama@gmail.com.
And sorry for the "a image", I meant "an image".
Have a good day, folks^^

topic closed, as per request.