WoW Download problem, Help please

[BurnIt420!]

So recently i tryed to start wow and received error #121.... so i did some research and found best way to fix is to reinstall

so i deleted everything and try to reinstall. but now every time the download reaches 16% i get an error and the installer shuts down

anyone have any ideas of whats wrong?
-EDIT
i used Blizzard download client

and the installer for the first world of warcraft keeps shutting down without displaying an error

[piller]

the download of what stops at 16%?

[Multitask]

your problem lacks description. 3 ways to install wow. 1) cd 2) blizzard dl client 3) torrent