Is it a correct motivation letter ?

Hello there,

i'm french and i'd like to know if my letter is orthographically correct. If some things can be changed because they are incomprehensible could you tell me them ?
Thx

4 December 2010
****** RECRUITMENT
8-9 ***** Street
****, IRELAND.
Object: Unsolicited application for a 4 weeks internship
Dear Mr *****,
In the framework of my HND in international business training abroad, this diploma prepares students to master all aspects of trade negotiations, have a good knowledge of foreign markets (culture, operation, features) but also economic and legal knowledge. It prepares for international logistics and custom operations too.
I must find an internship in canvassing. I would take place from 1/31/2011 to 2/25/2011. The purpose of this internship is to practice canvassing.
I chose Ireland because it's a country where I haven't been yet contrary to Wales, England or Scotland where I spent some months.
I remain at your disposal for any further information.
Yours sincerely.