Resignation letter

Hello Everybody,

Please help me by correct my resignation letter below.

Thanks in advance.

X, 20 October, 2009
H.E. Mr. John,

Subject: Resignation Letter

I am writing to formally notify you that I am resigning from my position as Administrative Assistant on January 14, 2009. I apologize for not being able to provide two weeks notice. However, I regret that, due to circumstances beyond my control, I need to resign immediately.
Thank you for the support and the opportunities that you have provided me during the last several years. I have enjoyed working for the agency and appreciate the support provided me during my tenure with the company. Thank you very much for the opportunity to work for (Company Name).

CC: 1. Mr. Tom, Finance Officer
2. Mrs. Ann, Administration Coordinator

Sincerely yours,