Trying to open a derma from a command

[The French Spy]

I've made a script that call a function which send a net message to the client to open a derma when he connect, I've also made a command to open the same derma but when I use the command nothing happens and I don't really know why :/

So here is my server script:

util.AddNetworkString( "OpenCharacterMenu" )

if file.Exists( "characters", "DATA" ) == false then
    file.CreateDir( "characters" )
end

hook.Add( "PlayerInitialSpawn", "Spawn", function( player )
    local rank = player:GetUserGroup()
    OpenCharacterMenu( player, rank )
    --local steamid64 = player:SteamID64()
    --WriteToFile(steamid64)
end )

hook.Add( "OnPlayerChat", "OpenCharacterMenuCommand", function( ply, strText, bTeam, bDead )
    if strText == "!character" then
        local rank = ply:GetUserGroup()
        OpenCharacterMenu( ply, rank )
        return true
    end
end )

function WriteToFile( steamid64 )
    file.Write( "characters/"..steamid64..".txt", steamid64.."," )
end

function OpenCharacterMenu( player, rank )
    net.Start( "OpenCharacterMenu" )
    net.WriteString( rank )
    net.Send( player )
end

and here is my client script:

net.Receive( "OpenCharacterMenu", function()
    local rank = net.ReadString()
    OpenCharacterMenuCl( rank )
end )

function OpenCharacterMenuCl( rank )
    local Frame = vgui.Create( "DFrame" )
    Frame:SetPos( 5, 5 )
    Frame:SetSize( ScrW() * 0.624, ScrH() * 0.6 )
    Frame:Center()
    Frame:SetTitle( "Character Menu" )
    Frame:SetVisible( true )
    Frame:SetDraggable( false )
    Frame:ShowCloseButton( false )
    Frame:MakePopup()

    local Button = vgui.Create( "DButton", Frame )
    Button:SetText( "Choose" )
    Button:SetTextColor( Color( 255, 255, 255 ) )
    Button:SetPos( ( ScrW() * 0.624 ) / 2 - 50, (ScrH() * 0.6 ) - 40 )
    Button:SetSize( 100, 30 )
    Button.Paint = function( self, w, h )
    draw.RoundedBox( 0, 0, 0, w, h, Color( 41, 128, 185, 250 ) ) -- Draw a blue button
    end
    Button.DoClick = function()
        Frame:Close()
    end
end

[ButterKing5000]

OnPlayerChat is a client only hook. Use GM/PlayerSay.

[The French Spy]

Thanks mate.