that may point to some issue on your server side we issue this query
Code:
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Basically that just updates the table with a replace statement which will update or insert a record in the table based on the default key of the iponline table which is the ipaddress. That said the table is updated with the record. So do all your users have the same IP. I showed an explicit classifieds site that shows this works fine and it is the same query we use in all our products.