Smoothing out Crescendo Decrescendo

Ugh.. ok i know i saw this on a video but i just can't figure out where I saw it. Maybe you most awesome peeps can help.
I have a 4 bar phrase with Viola Cello Bass and I'm trying to get a smooth crescendo from P to FFF. but every measure that plays gets louder incrementally not smoothly. Man I should have book marked that or wrote it down..
I have tried clearing the velocities
and I'm using the Notion sounds, no other library..
thanks
WERD
I have a 4 bar phrase with Viola Cello Bass and I'm trying to get a smooth crescendo from P to FFF. but every measure that plays gets louder incrementally not smoothly. Man I should have book marked that or wrote it down..
I have tried clearing the velocities
and I'm using the Notion sounds, no other library..
thanks
WERD