How do I set up a character set for a sprite font?

I see where I am supposed to type it in. However when I type in my desired text its all scrambled up. However my width and height for each character is correct... any ideas?

The actual font image total size also has to be divisible by the font size. So a font that has numbers 0 through 9 side by side each with a width of 20 pixels would have to be exactly 200 pixels wide