Cant Use paintutils

this is my code:

local image = paintutils.loadImage("Ja.nfp")
paintutils.drawImage(image, 3, 5)

i get the error:
paintutils.lua:38: attempt to call nill

Assuming your installed version of ComputerCraft has this as line 38, that would indicate that your "Ja.nfp" file wasn't found. I suspect you've got it sitting in a subdirectory of your main drive, in which case, if that's where you're also running the script from, all you need to do is shell.resolve() it.