Need help scrolling pixel fonts

Please someone…this has been driving me crazy. I’ve been having problems with pixel shifting and blurry pixel fonts when scolling them. I’m not very good at actionscript, but this the script that I have currently:

targY=0;
dragger._x=theMask._width;
dragger.onPress=function(){
startDrag(this,false,this._x,0,this._x,theMask._height-this._height);
}
dragger.onRelease=dragger.onReleaseOutside=function(){
stopDrag();
}
theText.setMask(theMask);
theText.onEnterFrame=function(){
scrollAmount=(this._height-(theMask._height/1))/(theMask._height-dragger._height);
targY=-dragger._y*scrollAmount;
this._y-=(this._y-targY)/1;
}