Help with SetTexture()

[Lathek]

This is my first time using lua and the WoW API. I am trying to make a target of target buff frame, but I am having trouble with SetTexture(). The only way I can seem to get any texture to appear is by putting file="texturelocation" as an attribute for <Texture>

Here is the relevant code:

xml

	<Frame name="sToTBuff">
		<Layers>
			<Layer level="BACKGROUND">
				<Texture name="sToTBuff1">
					<Size>
						<AbsDimension x="30" y="30" />
					</Size>
                       			<Anchors>
						<Anchor point="TOPLEFT" relativeTo="sToT" relativePoint="BOTTOMLEFT" />
					</Anchors>
				</Texture>
				<Texture name="sToTBuff2">
					<Size>
						<AbsDimension x="30" y="30" />
					</Size>
					<Anchors>
						<Anchor point="LEFT" relativeTo="sToTBuff1" relativePoint="RIGHT" />
					</Anchors>
				</Texture>
				<Texture name="sToTBuff3">
					<Size>
						<AbsDimension x="30" y="30" />
					</Size>
					<Anchors>
						<Anchor point="LEFT" relativeTo="sToTBuff2" relativePoint="RIGHT" />
					</Anchors>
				</Texture>
			</Layer>
		</Layers>
		<Scripts>
			<OnUpdate>
				sToT_UpdateBuff();
			</OnUpdate>
		</Scripts>
	</Frame

and lua

function sToT_UpdateBuff()
	--if event=="UNIT_AURA" then
		--for i = 1,16 do
			buff = UnitBuff("targettarget", 1);
			if buff then
				buff = string.gsub(buff, "\\", "\\\\");
			end
			sToTBuff1:SetTexture(buff); --sToTBuff..i doesn't work. Is there any way to set textures for each buff slot easily? Just using this to get one buff texture working.
		--end
	--end
end

I originally called sToT_UpdateBuff() from <OnEvent> but somehow that didn't work at all, so I stuck it in <OnUpdate> for now.

Anyone see what I am doing wrong? I hope the whole hing isn't completely incorrect.

[MetaHawk]

How about...

getglobal("sToTBuff"..i):SetTexture(buff);

I take it you are also registering that event in an 'OnLoad' statement?
ie: this:RegisterEvent("UNIT_AURA");