amibroker not backfilling

#1
I am subscribed to IQFeeds. For symbol @ES# amibroker does not pull tick data for more than 3 days. In database setting 'no of bars' is set to 500000. Base interval is 5 seconds. I have used the same feed in MotiveWave it is able to pull tick data from months back. I have posted this thread in the data forum also.
 
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