Change sv_wwwDlDisconnected to 0. If you've got a fast connection, you should also set up a fast download files server so people who connect to your game server can download everything faster than 12 KB/s.
sv_wwwBaseURL "" is the command which tells players where additional files (maps, sound packs etc.) can be downloaded faster. If you'd have your own domain it'd look like this:
sv_wwwBaseURL "http://www.example.com/fastdl"
And directories/files structure under your domain would have to look like this:
http://obrazki.elektroda.pl/6628866800_1363534567.png http://mygamingtalk.com/wiki/index.php/Silent_Sounds The question is: can you help yourself?