word ribbon customisation not showing?? Banging my head against the

[Shawn the sheep]

I have a really weird issue with the ribbon. I am using word 2007 and
have done ribbon customisation before. This was a while ago, and I do
remember somthing similar: I just can't get any customisation to show
up, whatever I try. I have tried using the most basic example, using
the custom ui editor, but nothing. I have opened the template i have
done a while ago and it works there. However, even copying the xml
from the working file into a new file doesn't work, nothing, no error
message, no customisation. For example, using the xml below I would
expect a custom group to show up, but nothing. Am I missing something
that I need to do in the template file I have created?

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/
customui">

<ribbon>
<tabs>
<tab idMso="TabHome">
<group id="CustomGroup" label="My new group"
insertBeforeMso="GroupClipboard">

</group>
</tab>
</tabs>
</ribbon>
</customUI>


Any ideas?
I also added the template location to the trusted sources, allowed all
macros, still nothing. Aaarrrghh.

Thanks