My ic7 won't burn any movies at 4x also if i set speed at "high"!!!!I have that's write 4x dvd-r, but is not a problem of my sony dru500a.With nero burning i can burn at 4x on the same media...But my home dvd read only the movies written by IC7 (i think IC7 have the best optimization for home players)...Antone know a solution for IC7 or explain how i can set nero burning for the same compatibility?