MSN Live search has deindexed some of my pages. Many of them are property pages like

http://www.example.com/Verticals/Pro...%2526VID%253D8

which used to be indexed. I went through the Live Search Guidelines and did not find the answer I was looking for. Do anyone know what would cause MSN Live Search to drop a page from the index and more important, how to get it reindexed and have it stay for good.