[Closed] Script doesn't work as button

I have the following script I am trying to make a mirror that works with morphers. And I am doing with an skinwrap and a morpher.
the scripts works quite well but when I try to make it a macroscript and put it as a button something happens that it doesnt work any longer, is like if the instructions didnt wait for the skinwrap to make its calculations, so the morpher deforms before the skinwrap mesh list is updated.

Any Ideas to solve this problem?

ObjectDeformed=selection[2];
ObjectOriginal=selection[1];

a=copy ObjectOriginal;

addmodifier a (morpher());
WM3_MC_BuildFromNode a.Morpher 1 ObjectDeformed;
addmodifier a (mirror());

a.position=ObjectOriginal.position;

b=copy ObjectOriginal;

addmodifier b (skin_wrap());
b.skin_wrap.meshList=#(a);
b.skin_wrap.falloff =0.01;
b.skin_wrap.Distance=0.01;
a.Morpher.Autoload_of_targets=1;
WM3_MC_SetValue a.Morpher 1 100.0;
convertTo b Editable_Poly;

delete a;
b.position.y=ObjectDeformed.position.y;