[Shinja]

are you sure you have ProxDetector already? if yes show it, no? here is it

PHP код:

stock ProxDetector(playerid, Float:max_range, color, string[], Float:max_ratio = 1.6)
{
    new
        Float:pos_x,
        Float:pos_y,
        Float:pos_z,
        Float:range,
        Float:range_ratio,
        Float:range_with_ratio,
        clr_r, clr_g, clr_b,
        Float:color_r, Float:color_g, Float:color_b;
    if (!GetPlayerPos(playerid, pos_x, pos_y, pos_z)) {
        return 0;
    }
    color_r = float(color >> 24 & 0xFF);
    color_g = float(color >> 16 & 0xFF);
    color_b = float(color >> 8 & 0xFF);
    range_with_ratio = max_range * max_ratio;
#if defined foreach
    foreach (new i : Player) {
#else
    for (new i = GetPlayerPoolSize(); i != -1; i--) {
#endif
        if (!IsPlayerStreamedIn(i, playerid)) {
            continue;
        }
        range = GetPlayerDistanceFromPoint(i, pos_x, pos_y, pos_z);
        if (range > max_range) {
            continue;
        }
        range_ratio = (range_with_ratio - range) / range_with_ratio;
        clr_r = floatround(range_ratio * color_r);
        clr_g = floatround(range_ratio * color_g);
        clr_b = floatround(range_ratio * color_b);
        SendClientMessage(i, (color & 0xFF) | (clr_b << 8) | (clr_g << 16) | (clr_r << 24), string);
    }
    SendClientMessage(playerid, color, string);
    return 1;
} 


EDIT: there is another error there, in your usage of GetPlayerName, its not like that if you want it that simple use a stock

PHP код:

stock GetName(playerid)
{
    new name[24]; GetPlayerName(playerid, name, 24); return name;
} 


PHP код:

CMD:me(playerid, params[])
{
    if(isnull(params)) return SendClientMessage(playerid, 0xFF0000FF, "SYNTAX: /me [action]");
    new string[128];
    format(string, sizeof(string), "* %s %s ", GetName(playerid), params);
    ProxDetector(30.0, playerid, string, 0xFF0000FF);
    return 1;
}