On the UScis site my case was frozen in 2007, and then my date based on visa bulletin became active. I had my Original EAC issued in 2006, and it expired in September of 2009, I didn't know that I should to renew it and I did that in April 2010.Now they send me a letter asking to show that I had EAC fro 9/2009 to 4/2010. Before and after those dates I have it, but I don't have it for those days, I was working for the same employer and pay all dues to government . What are my options, what should I do. Thanks.