formal email to request a transfer

Dear sir,
I would like to respectfully request a transfer from the Kandy branch to another branch due to some unavoidable personal problems.
I joined the bank's Colombo branch at 02nd of August 2010 as a junior bank assistant and promoted as a senior bank assistant after 2 years. I received a transfer to Kandy branch 2 months ago which I tried to cancel but could not. After working here for 2 months I have found out that those personal problems can be highly affected to my career and also to my personal life.
As a senior bank assistant I have devoted myself to the bank for the past 3 1/2 years and my experience at ......bank has been very rewarding. I am fully committed to continue my contribution in the years to come.
Your thoughtful consideration of my request is highly appreciated.