Accessing Old Modem for wireless password

Hi All,

I have NETGEAR wireless modem which is connected to my main PC. In another room on the otherside of the house I have an ethernet cable from the NETGEAR modem which connects to an old Netcomm NB9W wireless router/modem which I have converted to a wireless network which too works fine.

When I am in the other room my iphone connect to the NB9W wireless connection which works fine.

The problem now is that my wife has just got an iphone and I have forgotten the password to the NB9W.

I have tried connecting the NB9W directly into the computer but cant access the configuration page.

I must have done this originally so not sure why its not working now? Any ideas how to access this configuration page? How do I know the correct IP address etc?