why doesn't my script work? its supposed to add 2 int values together

local d = 0
script.Parent.Touched:Connect(function(hit)
    local h = hit.Parent:FindFirstChild("Humanoid")
    local p = game.Players:GetPlayerFromCharacter(hit.Parent)
    local stats = p:FindFirstChild("leaderstats")
    local str = stats.Strenght
    local coins = stats.Coins
    if h and d == 0 then
        if p and stats and str and coins then
            if str.Value > 0 then
                coins.Value = coins.Value + str.Value
            end
        end
    end
end)

the issue here is that the int values don't add up together any ideas?