After much painful and exasperating effort to skin the button component in MX 2004 (should it really be this convoluted to do something so simple and common?) I have finally succeeded in skinning the button component with my own images but now the button won't stay in the toggled state. Here is the code I have in an "actions" layer:

mx.controls.Button.prototype.falseUpSkin = 'falseUpSkin';
mx.controls.Button.prototype.falseDownSkin = 'falseDownSkin';
mx.controls.Button.prototype.falseOverSkin = 'falseOverSkin';
//mx.controls.Button.prototype.falseDisabledSkin = 'falseDisabledSkin';
mx.controls.Button.prototype.trueUpSkin = 'trueUpSkin';
mx.controls.Button.prototype.trueDownSkin = 'trueDownSkin';
mx.controls.Button.prototype.trueOverSkin = 'trueOverSkin';
//mx.controls.Button.prototype.trueDisabledSkin = 'trueDisabledSkin';

What am I missing? The buttons worked fine in terms of staying highlighted when I toggled them prior to changing the skins.<font face='Arial'></font id='Arial'>