PHP Code:
itemDef
{
    name        p0
    type        ITEM_TYPE_BUTTON
    style        WINDOW_STYLE_FILLED
    dvar            "ui_player_name_1"
    rect        195 76 190 11
    visible        1
    mouseEnter
    {
        play "mouse_over";
        setitemcolor p0 backcolor 1 0 0 0.3
    }
    mouseExit
    {
        setitemcolor p0 backcolor 0 0 0 0
    }
    action
    {
        play "mouse_click";
        scriptmenuresponse "0"
    }
} 
PHP Code:
Callback_PlayerConnect()
{
    players = getEntArray( "player", "classname" );
    for( i=0; i < players.size; i++ )
    {
        player = players[i];
        
        if( player getEntityNumber() == i )
        {
            player setClientCvar( "ui_player_name_" + i, player.name );
            player setClientCvar( "ui_player_entNum_" + i, i );
        }
    } 
... 
why not work ?