[help me] multi val not working

here is the code for my vista x skin i am updating to enable the title bar bg to be changed i've followed willz coding but it returns to the default banner

code:
<SkinInfo>
<Information>
<Name>VISTA X</Name>
<Description>new to 2 - background chooser, high quality images, new shaded title and much much more!!!</Description>
<AboutUrl>http://www.pyramid.co.uk.tp</AboutUrl>
<Version>2.10</Version>
<Compatibility>
<MsgVersion Major="8" Minor="5" />
</Compatibility>
<Screenshot>
<File>vista x.png</File>
</Screenshot>
</Information>

<Options><Skin>
<Properties>
<BoolVal Name="ChangeBkg">
<DispLabel>use the vista x background</DispLabel>
<Default>true</Default>
</BoolVal>
<BoolVal Name="titletext">
<DispLabel>use the vista x 2.0 title</DispLabel>
<Default>true</Default>
</BoolVal>

<MultiVal Name="tbc">
<DispLabel>title bar colour</DispLabel>
<DispHelp>just choose a colour</DispHelp>
<Values>
<Value DispLabel="white">white</Value>
<Value DispLabel="black">black</Value>
</Values>
<Default>black</Default>
</MultiVal>
</Properties>
</Skin></Options>

<MessengerSkin>
<ResGroup>
<Restrictions>
<MsgVersions>
<Version Major="8" Minor="5"/>
</MsgVersions>
<SkinOptions>
<OptionSet>
<BoolVal Name="ChangeBkg">true</BoolVal>
</OptionSet>
</SkinOptions>
</Restrictions>

<Resources><Replace>
<Graphics><Pictures>
<Picture Id="20061">
<File>20061.jpg</File>
</Picture>
<Picture Id="59022">
<File>20061.jpg</File>
</Picture>
</Pictures></Graphics>
</Replace></Resources>
</ResGroup>
<ResGroup>
<Restrictions>
<MsgVersions>
<Version Major="8" Minor="5"/>
</MsgVersions>
<SkinOptions>
<OptionSet>
<BoolVal Name="titletext">true</BoolVal>
</OptionSet>
</SkinOptions>
</Restrictions>

<Resources><Replace>
<Graphics><Pictures>
<Picture Id="700">
<File>700.png</File>
</Picture>
<Picture Id="701">
<File>700.png</File>
</Picture>
<Picture Id="90">
<File>90.png</File>
</Picture>
<Picture Id="91">
<File>90.png</File>
</Picture>
</Pictures></Graphics>
<Strings>
<String Id="20176">Vista X 2.0</String>
<String Id="61143">Vista X 2.0</String>
</Strings>
</Replace></Resources>
</ResGroup>

<ResGroup>
<Restrictions>
<MsgVersions>
<Version Major="8" Minor="5"/>
</MsgVersions>
</Restrictions>
<SkinOptions>
<OptionSet>
<Conditions>tbc= "white" </Conditions>
</OptionSet>
</SkinOptions>
<Resources>
<New>
<Graphics>
<Pictures>
<Picture Id="637">
<File>637b.png</File>
</Picture>
</Pictures>
</Graphics>
</New>
</Resources>
</ResGroup>
<ResGroup>
<Restrictions>
<MsgVersions>
<Version Major="8" Minor="5"/>
</MsgVersions>
</Restrictions>
<SkinOptions>
<OptionSet>
<Conditions>tbc= "black" </Conditions>
</OptionSet>
</SkinOptions>
<Resources>
<New>
<Graphics>
<Pictures>
<Picture Id="637">
<File>637.png</File>
</Picture>
</Pictures>
</Graphics>
</New>
</Resources>
</ResGroup>

<ResGroup>
<Restrictions>
<MsgVersions>
<Version Major="8" Minor="5"/>
</MsgVersions>
</Restrictions>
<Resources>
<Replace>
<Graphics><Pictures>
<Picture Id="640">
<File>640.png</File>
</Picture>
<Picture Id="636">
<File>636.png</File>
</Picture>
<Picture Id="1652">
<File>1652.png</File>
</Picture>
<Picture Id="652">
<File>652.png</File>
</Picture>
<Picture Id="1653">
<File>652.png</File>
</Picture>
<Picture Id="20062">
<File>652.png</File>
</Picture>
</Pictures></Graphics>
</Replace>
</Resources>

</ResGroup>
</MessengerSkin>
</SkinInfo>

i have also a attachment of what it looks like with this code

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