The wifi is not able to be switched on after installed the iOS 6

Dear technical team,

I am facing the issue after I have installed the iOS 6.0.1 (10A523) in the my iPad 2.

The wifi is not able to be switched on and it is grey out.

I have tried to reset the networking, reset and erase the IPAD content.

It does not work too. When I try to restore the setting from iTunes from my PC, it showed the error 3004.

Now my Ipad cannot be used at all.

Please advice.

Best regards,

Natalie