Sub accounts in Balance Sheet - specifically Assets

Sub accounts in Balance Sheet - specifically Assets

I've added in a new account, IP Developed, under Intangible Assets. When I run the balance sheet report, it shows on its own without a header, just tacked on the bottom of all the other assets. I'd like it to show under Long Term Assets or Other Assets. How can I do this? It won't let me add the new account as a sub-account.