Can you do my OC?
So, here it is: http://i.imgur.com/LCJzpO8.png
I couldn't add the cutie mark because it gets too small when I try to do it, so here it is: http://i.imgur.com/GtCaNXl.png
Try to upload the picture to Imgur, and paste the link there.
That may also be a problem with the format of the picture. What kind of image file is it? JPG? PNG?
That art is actually nice.
I saw some TF2 map with Equestria in the future. All of the Mane Six were there, and all of them were Alicorn princesses. All of them were designed pretty well.
That isn't really anything to worry about, there's much worse.