Is my appeal letter good?

<p>Dear Admissions Personnel,
Last week I learned that my application for UCLA was rejected. As you can imagine, I was extremely disappointed. UCLA has always been my dream university. There are so many great professors and so many opportunities. It will definitely provide an excellent education. Especially last year, when I accompanied my twin sister to her orientation program there, I learned more about this great school and liked it even more; my desire to attend it became even stronger. I’ve been working very diligently in order to get accepted by UCLA. It was heartbreaking when I discovered that, for unknown reasons, a wrong SAT score was sent to the admission office.
I have taken the SAT Reasoning Test twice, in March 2009 and October 2009. On the first test, I received a score of 1970. On the second test, my score jumped up 120 points --- a total of 2090. My critical reading went from 590 to a 640, and my writing score improved from 620 to 680. I was very frustrated when I realized that my higher score never arrived at the admission office. For remedial, I have already sent another official score report. I will also attach to this letter a printout of my online score report. I know that most appeals are rejected, but I don’t want to give up until I have tried all I can do.
Although I hope this misfortune has never happened, it has taught me a valuable lesson. I have the responsibility to check my application status frequently. As a prospective UCLA student, I should learn to do things thoroughly. Had I found out about this earlier, it wouldn’t be such a big problem. I’m very disappointed in myself for being careless in things so important like this. I will never make the same mistake again, and I’d like to do anything to solve this problem. I deeply apologize for any inconvenience this caused. I hope you can review my application with the new score report that shows my true ability. I want to show my potency to succeed in college. I hope that you can give me a chance to prove myself.
Again, I totally understand and respect your decision to deny me, but I really want you to reopen my application and consider it again. UCLA is still the school that I most want to attend. I really appreciate the time and energy you put into considering my application.</p>

<p>please correct any grammatical error and give me some suggestions! Thank you!!!!!</p>