In 7.1 the Corporate Directory is actually handled differently than in previous versions. The Enterprise Parameter URL is no longer used by default. Though, you can configure the entire system to use the URL or you can configure individual phones to use the URL. I wrote a blog about deleting Corporate Directory that actually gives details on how this "new" behavior is instituted and how you can manage devices to interact with the new feature. I am guessing that you are using a custom Corp Directory application and this is where you are running into some issues. Take a look at the following. Again the premise of the blog was about disabling Corp Directory but I think you may get some ideas on how to solve your issue.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.