install post-indexer and recent global post

hi,

in wordpress 3.0.2 i'm trying use post-indexer plugin. it said silently create new table and indexing user post in it. apparently none of that happen, even when i try create thus table manually, still nothing happen.
and the result recent global post cant work also.

please help in this case, what should i do for debugging or whatever it is..

thx..