Unknown namespace error when creating ribbon

Hello while trying to create a ribbon, I am getting the following error.  Attached is the error message and below is the xml  i have in the UsysRibbons table.

<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customUI">
  <ribbon startFromScratch="false">
    <tabs>
      <tab idMso="TabCreate" visible="false" />
      <tab id="dbCustomTab" label="A Custom Tab" visible="true">
        <group id="dbCustomGroup" label="A Custom Group">
          <control idMso="Paste" label="Built-in Paste" enabled="true"/>
        </group>
      </tab>
    </tabs>
  </ribbon>
</customUI>
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