When you are using an HP PCM+/NIM system, if it is managing a HP ProCurve switch on an interface assigned to a WLAN/Wireless zone, you need to deactivate two features; otherwise, you cannot manage the switch.
To configure wireless zone settings
Navigate to NETWORK | System > Interfaces.
Select your Wireless zone.
On Wireless, clear the Only allow traffic generated by a SonicPoint and WiFiSec Enforcement option.