I am with an organization in sales for the last one and half years. But due to some egoistic problem from my boss, he was issued a show cause letter to me due to i\'m not finish up my overtime on 12th Mei 2012 untill 5:30pm. But communication via email from her had stated clearly only 19th and 26th Mei all staffs must stayback untill above said time. From this situation I need professional point of view how to answer the show cause letter and am i did wrong if I refuse to acknowledge the letter. Appreciate anybody can advice.