Hello, and thank you for your quick response.
If you visit
http://www.watfordphilharmonic.co.uk you will see the existing menu on the home and other pages. Use the Testing menu link to view two demonstration pages Menu Test 1 and Menu Test 2.
In Menu Test 1 the ARI Ext menu has been assigned to the 'innertop' position, and in Menu Test 2, it is assigned to the Menu position.
I was hoping to replace the existing menu with the ARI Ex one as the existing one does not provide the accordion style nesting feature that is included in the ARI one.
I suspect the problem may lie in some sort of CSS conflict, but so far cannot spot it.
Any ideas?