creating a metadata set

Hi All,

I'm trying to create a new metadata.  I want to extend Silva Documents so they 
can be integrated into our knowledgebase.  I've created the metadata set 
through the metadata service in the zmi.  I added the metadata elements to 
the set, and configured their formulator fields.  I then made the set 
editable, and added the content type -> metadata mapping for Silva Document 
Version.  

The metadata set displays correct in the properties tab, but it doesn't save 
what I enter  (however the silva-content and silva-extra sets do save).  The 
fields I'm using are MultiListFields, indexed with a type of FieldIndex.  
Ideally, I want to pull the [Items] for the fields from our knowledgebase 
(which works), but whether the items are dynamic or entered on the 'Edit' 
tab, Silva doesn't save the metadata.

I've also tried creating a metadata set with just a StringField.  That also 
doesn't save.

The catalog service says the indexes for my metadata set are in the catalog.

Any ideas why my set won't save?

Andy