Hi Connor84,
The problem with people not answering, is that there is no information given by you, as to what you have as far an operating system. Nor where you were trying to delete the Network from. From Windows or from D-Link?
Windows XP Service Pack 3 is a Service Pack, it is not an operating system.
Windows XP Home Edition
Windows XP Professional Edition
Windows XP Media Edition - All operating systems.
To use Windows when connecting to your Named Network, whether it is broadcasting the name or not, you must reboot after giving the name to Windows and the Passphase, otherwise it simply connects and reconnects constantly.