Laptop 2 routers

I recently got a wireless router for my office and when tried to connect to it it asked for a password so I found out what it was and entered it and it worked ok. Then when I got home and tried to connect to my home wireless network which also needs a password I had to change it so I could connect. What is the best way to get around having to change passwords every time i go home or to the office. I am running xp and the home router is a billion BiPAC7300G and the home is an Asus.

 

I don't think the problem is with the PC, I think the router is password enabled. you may have to go into the router settings and disable it. Windows probably remembered the password and was auto logging but now you have a second router that is password enabled windows is only remembering one. the only other option is to make the password the same on both routers that way windows will continue the auto log in