FORGET THE PASSWORD

Right click WiFi Network Connection, and select Status.
Select Wireless Properties in the resulting pop-up window.
Select the Security Tab. This will show security type, encryption type, and the network security key.
Click the box beside Show Characters, and you should be able to see your network password.

Not to worry are you talking about the WIFI Password or the Password to login into your wireless modem??

1. To log into your wireless modem access control which enables you to configure the Modem like Profile, Security and more first you need RJ45 cable Connect the cable to LAN or your computer and the LAN of the Modem to enable communication between both of them you might not gain access with wireless because you will need the WIFI password After connecting the modem with RJ45 cable make sure they are connnected below your computer on the task bar where you see clock, Time you see 2 computers blinking if you are using window XP but if window 7 you see something like a transparent monitor in white

It should be written underneath the modem