WLAN button not wanting to work

[Fraser]

Hi Guys,
New to linux today so be easy on me but so far okish.

I have an HP NX9420 that was on XP. It all worked fine except the DVD.
Ive loaded on LL 2.0 and now the DVD works like a charm. Awesome.
I have connected to the net via hard wiring as I cant see any wireless network. THis is because I cant turn on the WLAN button (it has a blue light that has nothing happening) (that was working on XP this morning).
From reading other posts this is an issue but haven't been able to solve.

I managed to install rfkill;

# rfkill list all
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: yes

I also tried rfkill unblock all
This gave the error: Cant open RFKILL control device: Permission denied.

So basically im out of ideas so can anyone suggest something a noob can understand?

Thanks