Something causing errors, DFrame

[xDagunLP]

So everything above the code is not important and the same for the code under it.

Error
[LUA]
[ERROR] addons/addon/lua/autorun/client/cl_rps_panel.lua:89: attempt to call field 'Send' (a nil value)

1. DoClick - addons/rock_paper_scissors/lua/autorun/client/cl_rps_panel.lua:89

2. unknown - lua/vgui/dlabel.lua:232
[/LUA]
Code
[LUA]
function Pinned(playerSent)
local pinned = vgui.Create("DFrame")
pinned:SetSize(300,100)
pinned:SetPos(0,surface.ScreenHeight()/2-50)
pinned:MakePopup()
pinned:ShowCloseButton(false)
pinned:SetTitle("")
pinned.Paint = function(s,w,h)
draw.RoundedBox(3, 0, 0, w, h, Color(100, 100, 100,230))
draw.SimpleText(getPlayerFromSteamID(playerSent):Nick().." requested a fight!", "DermaDefault", w / 2, 20 , Color(255,255,255), TEXT_ALIGN_CENTER, TEXT_ALIGN_CENTER )
end
local BackroundCloseYes = vgui.Create( "DButton", pinned )
BackroundCloseYes:SetColor(Color(255,255,255))
BackroundCloseYes:SetText( "Yes" )
BackroundCloseYes:SetSize(100,40)
BackroundCloseYes:SetPos(pinned:GetWide() - pinned:GetWide()+40,pinned:GetTall()/2-5)
BackroundCloseYes.Paint = function( s, w, h )
draw.RoundedBox(5,0,0,w,h,Color(50,255,50))
end
BackroundCloseYes.DoClick = function()
pinned:Remove()
net.Send("TrueRequestAccepted") <----- LINE 89, yes the network string is correct.
net.WriteString(LocalPlayer():SteamID())
net.WriteString(playerSent)
net.SendToServer()
end

local BackroundCloseNo = vgui.Create( "DButton", pinned )
BackroundCloseNo:SetColor(Color(255,255,255))
BackroundCloseNo:SetText( "No" )
BackroundCloseNo:SetSize(100,40)
BackroundCloseNo:SetPos(pinned:GetWide() - pinned:GetWide()+160,pinned:GetTall()/2-5)
BackroundCloseNo.Paint = function( s, w, h )
draw.RoundedBox(5,0,0,w,h,Color(255,50,50))
end
BackroundCloseNo.DoClick = function()
pinned:Remove()
end
end
[/LUA]

[editline]13th February 2017[/editline]

Well, I found the problem. Dumb problem dont worry.

I wrote

[LUA]
net.Send("NAME")
stuff
net.SendToServer("NAME")

instead of

net.Start("NAME")
stuff
net.SendTOserver