What is wrong with this ds_list method?

songn = ds_list_create()

var f;

f = file_text_open_read(argument1)

while (!file_text_eof(f)) {

ds_list_add(file_text_read_string(f),"song")

file_text_readln(f)

}

I posted this on the GMC, maybe I'll get more help here.

Hey, I'm working on a GH like game for GM, Keyboard Hero. It's coming along wonderfully, with its very own track creator, saver, and loader. It saves your own custom tracks onto a special .KHS file.

Everything would work fine, but two things are wrong:

1: In the objplaysong2 Step event, when playing is true, it executes the .KHS file, which tells the game when to create what note. Now this works fine, but when the songs get longer, it gets laggy. How can I simply upload the file once to the game instead of constantly executing it?

2: In the Composer, when you create a song (which works great), you can't play notes for the first second/half-second of the song, because the game determines when to create the notes by a 'cstep' variable, which starts at zero. Now, it takes time for the note to get to the area where you hit it, and that time is subtracted according to the difficulty. But, if the 'cstep' variable goes into a negative number, it won't create those notes when playing. What's wrong?

Any help would be greatly appreciated.

Download it here: http://64digits.com/users/Fabio/keyboard_hero.gm6

(Doesn't have everything like holding notes, etc. in it, this is just to help my problems.)