[F8] Drawing Board Problem

Hiye
Long time no posting... :)
So to the point. I have been trying to make a program to draw up a chart really quickly in flash, I've gone with the idea to let the user do it in a way you will put clips in a Word Doc. By that I meant to make the brackets pre-defined and the textboxes created automatically by actionscript.
Sorry, a bit hard to explain this. :doughnut:
So i've gone to the first step to script the function to create the bracket using attachMovie, and then resize it to the size (mouse startpoint X,Y, minus mouse endpoint X,Y) but I hit dead end at the first step. Somehow my function goes weird when i test it:
I used a mc as background so it would record the clicks, I'm not really good at using listeners you see... :p ..and I programed a script to put the bracket onto the screen when i clicked mouse but with no resizing,

"function"(startx,starty,targetHeight(=200),target Width(=30))
sorry this is no syntax just making the point clearand attach the clip at startx, starty. but when I click the movieclip the bracket appears on the movieclip, but the movieclip scaled also, so it's sort of weird to see the mc which covered the whole stage rescaling with the bracket.
.....I'm being stupid I know.
So can anyone actually supply me the Function script to do this properly?