attempt to call field 'OnServerEvent' (a userdata value)?

attempt to call field 'OnServerEvent' (a userdata value) Hi, I has two scripts, One Server Script, Other Local Script, they contact by remote event. The error is in the server script

Local Script :

local player = game.Players.LocalPlayer
script.Parent.MouseButton1Click:Connect(function()
		 game.ReplicatedStorage.msg:FireServer(script.Parent.Parent.TextBox.Text, game.Players.LocalPlayer.Name)
end)
script.Parent.Parent.TextBox.FocusLost:Connect(function(enterPressed)
		 game.ReplicatedStorage.msg:FireServer(script.Parent.Parent.TextBox.Text, game.Players.LocalPlayer.Name)
end)

Server Script :

function f1(text,player)
game.Players:FindFirstChild(player).Character.Head.Msg.Image.Texter.Text = text
end

game.ReplicatedStorage.msg.OnServerEvent(f1)