? about my preloaders?

Why does all the preloaders that i make (sourced from different tutorials) only appear once the loader has reached about 48% when i test them under 56K and 28.8 (or any speed)??? …before 48% the screen is blank, when it should have loaded the text and graphics already (from 0%) it is VERY minimal text/graphics too.

Can anyone help??

Joel.