I entered the U.S as a child and went to renew my green card upon turning 18. My first attempt at renewing was denied because I bounced the check to the treasury department. During my second attempt, 9/11 occurred and the process was completely changed. Through a background check I found out someone else had been using my resident card number. When I went to look into it, the immigration office claimed that they couldn't find my file, making it difficult for me to pass the background part. I got the constant run around for a few years and eventually gave up. Its been considerable time since I last tried, but am determined to renew my card, so I can apply for naturalization.