Shoutbox

please can anyone help me...Everytime im trying to install ''my own'' skin...There;s a error.."says : the *skin* is damaged and so i can not install?

Anyone know this problem?
And what am i supposed to do?
This is what i have for now:

<SkinInfo>

<Interfaces>

    <Window Id="WndTest" Version="1">
        <Attributes>
            <Caption>Test Window</Caption>
        </Attributes>

        <TitleBar>
            <Title><Text>Hello!</Text></Title>
        </TitleBar>

        <Position ClientWidth="170" ClientHeight="45"/>
        <DialogTmpl/>

        <Controls>
            <Control xsi:type="StaticControl" Id="LblTop">
                <Position Left="10" Top="10" Width="150"/>
                <Caption>Hello world!</Caption>
            </Control>

            <Control xsi:type="ButtonControl" Id="BtnClose">
                <Position Left="115" Top="25" Width="50"/>
                <Caption>Close</Caption>
            </Control>
        </Controls>
    </Window>

</Interfaces>

</SkinInfo>