Why isn't my camera interpolation script moving anywhere?

I'm working on a simple plugin that lets you easily record establishing shots in studio. The basic premise is that you can set an interpolation end point and an interpolation length. However, even though I'm not getting any errors and I'm absolutely sure that my script is running all the way through, the camera itself never moves. Any help would be appreciated. Thanks!

NOTE: I've tried this in both a regular script and a local script, both yield the same result.

--user data
local camera=	Workspace:WaitForChild("Camera")

--meta variables (All of these get a value from other parts in the script)
local isOn =true
local length=	1
local endPos =CFrame.new(0,0,0)
local isRunning =false

function interpolate()
	if isOn and length and endPos and not isRunning then
		isRunning=true
		if not camera then
			camera=Workspace:WaitForChild("Camera")
		end
		camera.CameraType=Enum.CameraType.Scriptable
		camera:Interpolate(endPos,endPos*CFrame.new(0,0,20),length)
		wait(length)
		if isRunning then
			camera.CameraType=Enum.CameraType.Fixed
			isRunning=false
		end
	end
end

runButton.MouseButton1Click:connect(interpolate)

I am not the best scripter and not fully sure about if this would work but, I will give this answer a shot. I have made some comments below.

--user data
local camera=   workspace:WaitForChild("Camera")

--meta variables
local isOn= true
local length=   1
local endPos= 
local isRunning= false

function interpolate()
    if isOn and not isRunning then -- I don't think you could check for the others, so I left these in.
        isRunning=true
        if not camera then
            camera=workspace:WaitForChild("Camera") -- Would be best to make the "W" on workspace a lower case.
        end
        camera.CameraType=Enum.CameraType.Scriptable
        camera:Interpolate(endPos,endPos*CFrame.new(0,0,20),length)
        wait(length)
        if isRunning then
            camera.CameraType=Enum.CameraType.Fixed
            isRunning=false
        end
    end
end

runButton.MouseButton1Click:connect(interpolate)

If this helped, please accept my answer :)