one of my friend told me that lashker taiba has a major role in this regard.
LK chief called yunus khan and threatened him that pak team will have to face the consequence if they won the match against australia...... so pak team had to lose the match .............. aham
by the way i doubt the veracity of this theory
I have a better theory.
LK chief actually called Ponting and said ager Aus match nahee jeeta tu wo Lee kee tangeen toor dai ga :)