You're probably not seeing anything because you don't have the letters in the correct order. Take another look at the bitmap font I showed you earlier. load_bitmap_font reads from left to right, top to bottom. You have capital A starting in the second position when it should start in the 34th position. Also, you might want to make your magic pink rectangles slightly taller so that no letters fall off the edge. If they even load that way, they will likely be cut off so you only have a partial letter when you print it on the screen. Also, the top of each row has to have the same y value, as well as the bottom of each row. And the height of each row has to be the same.
If you wait a little bit, I'll whip up a font template maker.
Here it is :
FontMaker.zip : source code and win32 static exe (uses Allegro 4)
From the command line, type FontMaker.exe --help or just FontMaker.exe to see the usage information. FontMaker will create a new font template with or without text, with characters any size 4x4 or greater and as .bmp, .pcx, or .tga files.