He can't grant permission to manage his account without a legal LPA to help make decisions, or to make decisions on their behalf. Have you already registered this? If so your best bet is to call the support line rather than using the forums.
Chances are though that there's a problem with the installation and that's why it's been delayed. It'll still be installed as soon as possible but could be delayed by upto 8 weeks if things such as a blockage have been discovered.