DataStores aren't working cross-server, only on the local server?

I've tried multiple things including OnUpdate and using a loop with GetAsync. They work on the server you're in just not cross-server. It's annoying because I really need it. I've heard it's buggy but this is really getting on my nerves. Here's an example I took, but it should work.

ds = game:GetService("DataStoreService"):GetDataStore("colorstore")             --initializes DataStore as 'ds'

while true do
    print(ds:GetAsync("colorkey"))
    wait(.1)
    if ds:GetAsync("colorkey") == 1 then                                    -- Sets block to red when "colorkey" value is 1
        script.Parent.BrickColor = BrickColor.new(Color3.new(1, 0, 0))
    elseif ds:GetAsync("colorkey") == 2 then                                -- Sets block to blue when "colorkey" value is 2
        script.Parent.BrickColor = BrickColor.new(Color3.new(0, 0, 1))
    else                                                                    -- Sets block to white when neither condition is met
        script.Parent.BrickColor = BrickColor.new(Color3.new(1, 1, 1))
    end
end

Here's the button script...

ds = game:GetService("DataStoreService"):GetDataStore("colorstore")

function onTouched(hit)
    ds:SetAsync("colorkey", 2)
    end

script.Parent.Touched:connect(onTouched)

Again this isn't my example but it was posted on the dev forum and confirmed working. Thanks in advance.