Font

I'm trying to make a number font, but this is what's going wrong.
This is my image file:

But when I write 1234567890, I get 012345678. And the zero doesn't even show up as a 9, it's just blank.
This is my image file:

But when I write 1234567890, I get 012345678. And the zero doesn't even show up as a 9, it's just blank.