Checking for an update... What's wrong with my script?

Okay, so I have written some code, and when I update the plugin, a gui shows up (if the plugin is opened) and tells the player to update the plugin via the Plugin Manager. However, it started working at first, and then it just stopped. Can you tell me what's wrong? Did I code this right?

If there are any sources I can look at, I'd appreciate if you give me the links.

Thanks...

Code:

local AssetId = 142776964

----

local Info = game:GetService("MarketplaceService"):GetProductInfo(AssetId)

while true do

    wait()

    local NewInfo = game:GetService("MarketplaceService"):GetProductInfo(AssetId)
        if NewInfo["Updated"] ~= Info["Updated"] then
            if NewInfo["Description"] == Info["Description"] and NewInfo["Name"] == Info["Name"] or NewInfo["AssetId"] ~= game.PlaceId then

            script.Parent.Main.Update.Visible = true
            script.Parent.Main.Tabs.InfoButton.Visible = false
            script.Parent.Main.InfoPage.Visible = false

            else

                Info = NewInfo

        end 
    end
end