Hi Dave
When I orginally wrote this post I was invoking directly through the link. However, we are developing a new website that amongst other things allows someone to signup for a new method account that LaCrews manages. So, we are now calling service from within our code. We are still getting the same error but the account is being created.
Since it doesn't look like this causes a problem with the new account, for the time being, we'll capture both the error 23 and success as properly having created the new account.
It would be great if you can post back here when the fix is done then we can adjust our code accordingly.
Thanks for your help with this.