loader not showing

hi, everything works fine, but am loading some big files and the svwloader.gif is not showing ever.
is there a way for me to fix this ?

thank you

on 1.6

fixed, i just added the full path to svwloader.gif www.mysite.com/modules/hot....../svwloader.gif
on css file

works like a charm

i also change the canvas on the svwloader.gif so i can put it on center
is there a way to center it on the css ??