Does anyone know why Chuck Liddell backed out of the fight against Vanderlei Silva?

The reason why they have not faught is because UFC and Pride could not agree which company would host the event and would it be held in the US or Japan. Also how they would split the revenue and how the fighters would be paid. Further more if Silva was to win would he take the title from Liddel or would it be a non title fight. Think about it, if UFC hosted the event they would have have first choice of venue and sponsers etc.... Pride would have to wait for their cut of the profits and their sponsers would be pissed off that they couldn't be mentioned. Same for if Pride hosted it...