What the crap??!!

SOOOOO....today I finished this pic that I started yesterday and I wanted to upload it to the Otaku. So I write a LONG description about the pic and then click 'Share Masterpiece' and it says that the pic doesn't match the size requirements and is too small!! WHAT THE FREAKING CRAP?? So, I stretch it a little and make sure the size is bigger and try it again. Then it STILL rejects my pic!

Does anyone know of a way to change the size of a page without ruining it?
I use Manga Studio, so is there something I can do to change the page size??

PLEASE HELP!

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