fuzzy lookup taking too much time

I have a SSIS package where a small table of 270 rows are fuzzy looked up with a table in another sql server and inserts the records to a temporary table. This takes more than 3 hours in debug mode or so and never goes beyond this step.I have used a OLE DB destination to insert to temporary table and temporary table doesn't get a value.

How big is that other table? The fuzzy will build an index to start with, and this can take time. Review the options on the second tab to influence the index. Also check obvious things like blocking or such like? What about a profiler trace, anything untoward?

|||other table also is the same size and has same no of rows.Thank for the clues I found that some of the NOT null columns in the destination table were not mapped which result in failure of insert. Now it inserts correct rows to temp table and fails with a primary key violation which means its going in a never ending sort of a loop. I am going to put a profiler trace to identify the problem.Any advice welcome