I have created a hosted network in my windows7 system. The netsh wlan show hostednetwork command gives the output

Hosted network settings
-----------------------
    Mode                   : Allowed
    SSID name              : "rambo"
    Max number of clients  : 100
    Authentication         : WPA2-Personal
    Cipher                 : CCMP

Hosted network status
---------------------
    Status                 : Started
    BSSID                  : xx:xx:xx:xx:xx:xx
    Radio type             : 802.11n
    Channel                : 11
    Number of clients      : 1
        xx:xx:xx:xx:xx:xx        Authenticated

But I have forgot the password for this connection and after some googling I found the command netsh wlan refresh hostednetwork YourNewNetworkPassword. But on executing this command it get the error

C:\Users\user>netsh wlan refresh hostednetwork rambo123
Invalid value "rambo123" for command option "data".

Usage: refresh hostednetwork [data=]key

I have no idea what is wrong with this command.