why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.www2.tvboxnow.com- k4 P) b. [( t$ |' F. B
they say the "red cross" mean no space on your computerwww2.tvboxnow.com  |. N5 h4 m& Y6 t
www2.tvboxnow.com+ d8 D9 {7 w+ i
but my harddisk is not full...how come it still doing that