Need help with dynamic lists

[Galacticat42]

Okay, for my ATOM mod, my first real roadblock here is trying to get a list on a screen to update dynamically. I've been looking at the different screens already in the game and have come up with this.

function setupPlanetTerritories(Planets, PlanetNum)
	g_Planets = {Planets};
	local bFoundHome = true;
	Controls.StarName:SetText("Sol");
	Controls.PlanetStack:DestroyAllChildren();
	for i=1,PlanetNum do
		Name = Planets[PlanetNum][2];
		local instance = {};
		print(Name);
		ContextPtr:BuildInstanceForControl( "PlanetEntry", instance, Controls.PlanetStack );
		[B]instance.PlanetName:SetText(Name)[/B]
	end
        Controls.PlanetStack:CalculateSize();
        Controls.PlanetStack:ReprocessAnchoring();
	Controls.PlanetScroll:CalculateInternalSize();
end
LuaEvents.setupColonyTerritories.Add(setupPlanetTerritories)

And the XML that it refers to is

			<ScrollPanel Offset="0,28" Size="210,442" ID="PlanetScroll" Vertical="1" >
				<ScrollBar  Offset="8,0"  Style="VertSlider"      Anchor="R,C"   AnchorSide="o,i"    Length="434" />
				<UpButton   Offset="8,2"  Style="ScrollBarUp"     Anchor="R,T"   AnchorSide="o,i"    />
				<DownButton Offset="8,2"  Style="ScrollBarDown"   Anchor="R,B"   AnchorSide="o,i"    />
				
				<Stack Anchor="C,T" StackGrowth="Bottom" ID="SystemStack" >
					<Box Size="175,45" Color="Beige,0" Anchor="C,T" >
						<Label Offset="0,0" Font="TwCenMT20" Anchor="C,C" String="Star Name" ID="StarName" />
					</Box>
					<Stack Anchor="L,C" ID="PlanetStack" />
				</Stack>
			</ScrollPanel>

		</Box>

		<!--=======================================================================================================================-->
		<!--=======================================================================================================================-->
		<Instance Name="PlanetEntry" >
			<Button  Size="210,24" ID="Planet" >
				[B]<Label Offset="20,0" Font="TwCenMT16" Anchor="L,C" String="Planet Name" ID="PlanetName"  />[/B]
				<ShowOnMouseOver>
					<AlphaAnim Anchor="L,C" Size="210,27" Pause="0" Cycle="Bounce" Speed="1" AlphaStart="2" AlphaEnd="1"  >
						<Grid   Size="210,27" Offset="0,2" Padding="0,0" Style="Grid9FrameTurnsHL" />
					</AlphaAnim>
				</ShowOnMouseOver>
				<!-- Selected State  -->
				<Grid Anchor="C,C" Offset="0,1" Size="210,26"  Style="Grid9FrameTurns" Hidden="1" ID="PlanetEntryHighlight" />
			</Button>
		</Instance>

The problem I'm having is that tuner is complaining that instance.PlanetName is a nil value when it clearly has a string for text.