WTO's impotence???? Serious question

[steel108]

I was told to post this in Leg so here goes:

I'm writing a paper on the WTO for my IBUS class and the dispute between the US and Antigua is really f'ing everything up. I can't seem to find a reason why the WTO ruling has absolutely no effect expect that America doesn't give a f. The WTO has never been so powerless before (or so it seems). What are the underlying causes for the ineffectiveness of the WTO ruling?