I suppose you're table is pretty big. What happens is that while EM retrieves all your records it puts the table in so-called firehose mode. This means that you already see the first records but EM is still busy to get the rest of them. You have to wait until all records are loaded before you can execute any transactions.
Workarounds are either using QA or retrieving only a few records in EM using the TOP clause.
M
[font="Verdana"]Markus Bohse[/font]