Hey Sierra,
The problem you're experiencing can be a little confusing. The command you want to use if you're loading an image file (any image file, from PNG to JPG and yes, BMP) is LOAD IMAGE, as such:
LOAD IMAGE "filename.bmp", imagenumber, textureflag
The LOAD BITMAP command is also used to load .bmp files but the term
bitmap has a specific meaning in DBPro that is a lot more advanced than displaying simple images on the screen.
If your goal is to load an image and display it on the screen, use LOAD IMAGE, even if the file you're loading is a .bmp. It's a little counter-intuitive if you're new, but LOAD BITMAP is not a command you'll be using anytime in your beginning stages.