permalink conflict

I’ve got a taxonomy called ‘event’ set to the slug ‘buildaparty’ and a template ‘taxonomy-event.php’ very nicely picking up the various event types on the url examplesite.com/buildaparty/eventtype

However… I also have a Parent page with slug ‘buildaparty’ and some child pages ‘edit’ and ‘thankyou’ that should pick up on the url ‘examplesite.com/buildaparty/edit’ or ‘examplesite.com/buildaparty/thankyou’. They come up ‘Not Found’ presumably because of the taxonomy above. All other parent/child combinations on the site work fine.

Any ideas anyone? I would have thought this would be a reasonably common problem but can’t find anything on google…

Many thanks,
Rob