UI not hiding when its supposed to.

[Grimsin]

One of my xml frames is still on screen and functioning although size and location changed when adding that line. My other frames how ever are missing all together i changed the position to absolute center and they still do not show. Here is the code. it shows nothing

<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/
..\FrameXML\UI.xsd">
    <Frame name="GrimUIcoreArtB1" parent="UIParent" frameStrata="BACKGROUND"  frameLevel="0">
        <Size>
      <AbsDimension x="300" y="152" />
    </Size>
    <Anchors>
      <Anchor point="CENTER" relativeTo="UIParent">
        <Offset>
          <AbsDimension x="0" y="0" />
        </Offset>
      </Anchor>
    </Anchors>
    <Backdrop bgFile="interface\AddOns\GrimUIcore\Art\Bottom1">
      <BackgroundInsets>
        <AbsInset left="0" right="0" top="0" bottom="0" />
      </BackgroundInsets>
      <TileSize>
        <AbsValue val="0" />
      </TileSize>
      <EdgeSize>
        <AbsValue val="0" />
      </EdgeSize>
    </Backdrop>
  </Frame>