you need a little bit more code for a good tester script
a really small basic is this
sync on
sync rate 60
load object "skybox.x", 1
position object 1,0,0,0
position camera 0,10,-10
point camera 0,0,0
do
rem safe exit
disable escapekey
if escapekey()=1
delete object 1
end
endif
sync
loop
adjust the camera position to suit what model u are looking.
understand the xyz positions of the camera and your objects and it gets easier each time u have to apply 3d concepts.
Now if you havent made a project folder for your example DBP wont know the basepath and therefore not know where the skybox file is.
steps to try :
make a folder
save the model in that
save your code there also
save a project file
run it