Change Auditing

I'm using Ektron CMS v9.20 and have enabled Change Auditing by setting web.config ek_cmsauditlogging to "true". I'm finding that no error message is displayed to the user, nor is an exception logged, when a menu, user or taxonomy, is deleted despite setting the appropriate values. Results are as expected for content and folder deletion.

I have not created any roles. Any suggestions? Below is my ektron.cms.auditing.config file:

<?xml version="1.0"?>
<cmsaudit>
<settings>
<!-- Notice: Values of role name have maximum of 41 letters -->
<add name="MenuDeleterRole" value="MenuDeleter"/>
<add name="UserDeleterRole" value="UserDeleter"/>
<add name="TaxonomyDeleterRole" value="TaxonomyDeleter"/>
<add name="FolderDeleterGroup" value="FolderDeleter"/>
<add name="RecycleBinFolderName" value="Recycle Bin"/>
</settings>
<strategies>
<!-- Valid values for ContentAuditing:
LogandArchive - Log and set content archived rather than delete content
LogandDelete - log and delete content
None
-->
<add name="ContentAuditing" value="LogandArchive"/>

<!-- Valid values for FolderAuditing:
LogandArchive - Log and move folder to configured recycle bin folder above
LogandDelete - Log and delete
None
-->
<add name="FolderAuditing" value="LogandArchive"/>


<!-- Valid values for MenuAuditing:
LogandException - Log and cancel delete action
LogandDelete - Log and delete
None
-->
<add name="MenuAuditing" value="LogandException"/>


<!-- Valid values for TaxonomyAuditing:
LogandArchive - Log and set taxonomy invisible to user
LogandException - Log and cancel delete action
LogandDelete - Log and delete
None
-->
<add name="TaxonomyAuditing" value="LogandArchive"/>


<!-- Valid values for UserAuditing:
LogandException - Log and cancel delete action
LogandDelete - Log and delete
None
-->
<add name="UserAuditing" value="LogandException"/>
</strategies>
</cmsaudit>