why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
3 p- c! _: ^. V! ]1 [  d/ B/ k$ qthey say the "red cross" mean no space on your computer+ F6 P( V* N. h* L1 ]! y
1 e& B/ O0 l/ B6 C5 o  o
but my harddisk is not full...how come it still doing that