Disappearing text?

[kung foo man]

This is the code used in Killtube servers:

addAd(ad, scale, color)
{
    if ( ! isDefined(level.ad))
        level.ad = [];
    i = level.ad.size;
    level.ad[i] = spawnstruct();
    level.ad[i].ad = ad;
    level.ad[i].scale = scale;
    level.ad[i].color = color;
}

precache()
{
    for (i=0; i<level.ad.size; i++)
        precacheString(level.ad[i].ad);
}

ad()
{
    level.hud_ad = newHudElem();
    level.hud_ad.horzAlign = "fullscreen";
    level.hud_ad.vertAlign = "fullscreen";
    level.hud_ad.alignX = "center";
    level.hud_ad.alignY = "top";
    level.hud_ad.x = 320;
    level.hud_ad.y = 380;
    level.hud_ad.alpha = 0;

    wait 10;

    while (1)
    {
        for (i=0; i<level.ad.size; i++)
        {
            level.hud_ad.fontscale = level.ad[i].scale;
            level.hud_ad.color = level.ad[i].color;
            level.hud_ad fadeOverTime(1);
            level.hud_ad.alpha = 1;
            level.hud_ad.label = level.ad[i].ad;
            wait 10;
            level.hud_ad fadeOverTime(1);
            level.hud_ad.alpha = 0;
            wait 20;
        }
    }
}

Call it like this in startgametype():

    std\ad::addAd(&"Visit killtube.org! first message...", 2, (1,0,0));
    std\ad::addAd(&"Visit killtube.org! second message...", 2, (1,0,0));
    std\ad::addAd(&"Visit killtube.org! third message...", 2, (1,0,0));
    std\ad::precache();