How do I enable the WIFI radio of an HP ProCurve 420ww Access Point?

Question

So based on this old question of mine I figured out that I can reset the access point and access it using telnet through a wired Ethernet connection.

I have set a new password, I have set up the Ethernet connection so it doesn't conflict with my main router, and most importantly I have specified the country because this turns the WIFI radio on - except it didn't...

I have the Getting Started Guide and also the Management and Configuration Guide as well as this official FAQ. They all indicate that the WIFI radio is turned on when I have specified the country.

--> Why does the status still say "Radio Status : Disabled"?

HP ProCurve Access Point 420#show system 

System Information
============================================================
Serial Number         : TW413QB09X
System Up time        : 0 days, 0 hours, 4 minutes, 3 seconds
System Name           : Enterprise AP
System Location       : 
System Contact        : Contact
System Country Code   : AT - AUSTRIA 
MAC Address           : 00-0D-9D-F6-65-78
IP Address            : 192.168.1.3
Subnet Mask           : 255.255.255.0
Default Gateway       : 192.168.1.1
VLAN State            : DISABLED
Management VLAN ID(AP): 1 (U)
IAPP State            : ENABLED
DHCP Client           : DISABLED
HTTP Server           : ENABLED
HTTP Server Port      : 80
HTTPS Server          : DISABLED
HTTPS Server Port     : 443
Slot Status           : 802.11g
Radio Status          : Disabled
Software Version      : v2.2.5
SSH Server            : DISABLED
SSH Server Port       : 22
Telnet Server         : ENABLED
Max Telnet Session    : 4
Serial Port           : ENABLED
Reset Button          : ENABLED
SSID Number Supported : 8
============================================================

Answer 1

From the FAQ you linked it has to bet set and saved:

Q: How do I set the Country Code to enable the radio?

The correct Country Code must be set for the country in which you operate the access point so that it uses the correct authorized radio channels for wireless network devices.

The North America product, J8130A, comes with the Country Code pre-configured; the worldwide product, J8131A, does not. The radio is disabled if the Country Code is not set. Once the Country Code is set and saved, the radio is enabled.

If you are using the worldwide product, J8131A, before configuring radio settings on the access point, you must first use the CLI to set the Country Code. You can display the available country codes in the CLI by using the country? command from the Exec level. After a Country Code is entered the country command is removed from the Command Line Interface (CLI). If an invalid Country Code has been entered, reboot the access point by pressing the reset button for at least five seconds. This restores the factory default settings.