why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.tvboxnow.com/ G$ x* |4 r1 u) E; x6 x6 c3 x5 N
they say the "red cross" mean no space on your computer
  t6 o. W% O$ }- U+ S0 c( W$ t ! y$ x2 p+ f0 H- E; _6 A' i: m1 z$ y
but my harddisk is not full...how come it still doing that