麻烦老师帮我批改下作文，指出语法错误谢谢！

麻烦老师帮我批改下作文，指出语法错误谢谢！
Dear professor li,
I am pleased to inform you that we are organizing a speech contest on 6-7 january 2013 inclass two grade three.
You are invited to participate in this important speech contest as our judge.we have twelve players and you need to give those players who take part in the speech contest a mark and make a impersonal evaluation upon the currency of the speech contest.should you be interested .please let us know at your earliest convenience as soon as possible so that we can relevant arrangement upon condition.
Looking forward to seeing you in this speech contest.