Porting RPG Tile Tutorial AS1 to AS3

I am trying to convert the rpg tile tutorial from Seifertim and from another website (http://www.tonypa.pri.ee/tbw/start.html) from AS1 to AS3 as I believe AS3 is the way to go. I have no prior experience with Flash, however I do have knowledge with PHP and Javascript. I like trying harder things as it is more challenging and I learn more.
In any case, I am having difficulty with one portion of the conversion, I keep getting an error 1026 saying that “constructor functions must be instance methods” in regards to my symbol “char”.
I have attached the fla file, if someone could look at it and give me a hand that would be great. For the moment I will continue to program in AS1 lol.