[Tweener] Problem with blur

[Flash Mediastart]

Hi List,

I try to tween a movieclip on mutli properties :
_xscale,_x,_yscale,_y on the same tween no probleme
_Blur_blurX,_Blur_blurY on the same tween no probleme

but if I try to use all theses properties in the same twen ( first and 
second example) only the properties of the first example are executed !

here is my code :

Tweener.addTween(_mcZoom, { _xscale:100, _yscale:100, _x:_nX, 
_y:_nY,_Blur_blurX:10, _Blur_blurY:10, time:2, 
onComplete:Delegate.create(this, done) } );

or

Tweener.addTween(_mcZoom, { _xscale:100, _yscale:100, _x:_nX, _y:_nY, 
time:2, onComplete:Delegate.create(this, done) } );
Tweener.addTween(_mcZoom, {_Blur_blurX:10, _Blur_blurY:10,delay:2,time:2} );

None of theses codes works correctly, the blur never applied !
Any ideas ? I'm sure I do something wrong but what ?

Thx