Burnatonce

Hi! I own a pioneer dvr-109 and lately I’ve been having trouble with cd-r writing speed until I tried burnatonce. How come when I use Nero 5.5.10.56 or Disc Juggler 4.50.1179 I cannot burn at a higher speed than 16x but with burnatonce I get successful burn at 40x? thanks

oops I should’ve posted this in CD and DVD Burning Software, can someone move the thread?