Cant get a simple frame to display in WOTLK

[maciekish]

Hi, I'm still very new to addon development and i'm struggling to display a simple frame. It gets loaded because the chat message gets displayed and if i enable mouse, i cant click through it, so its there in the middle of the screen but invisible. Can anyone help me with the background please? I want a black background with a silver frame.

<Ui xmlns="http://www.blizzard.com/wow/ui/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.blizzard.com/wow/ui/ http://wowprogramming.com/FrameXML/UI.xsd">
  <Frame name="CritlineClassicDisplay" parent="UIParent" toplevel="true" enableMouse="false" movable="true">
    <Scripts>
      <OnLoad>
        print("Frame Loaded")
      </OnLoad>
    </Scripts>
    <Size>
      <AbsDimension x="400" y="200"/>
    </Size>
    <Anchors>
      <Anchor point="CENTER" relativePoint="CENTER"/>
    </Anchors>
    <Backdrop bgFile="Interface\DialogFrame\UI-DialogBox-Background" edgeFile="Interface\DialogFrame\UI-DialogBox-Border" tile="true">
      <BackgroundInsets>
        <AbsInset left="11" right="12" top="12" bottom="11"/>
      </BackgroundInsets>
      <TileSize>
        <AbsValue val="32"/>
      </TileSize>
      <EdgeSize>
        <AbsValue val="32"/>
      </EdgeSize>
    </Backdrop>
  </Frame>
</Ui>