Hmmm, according to this
User Manual your router is Wireless-G not Wireless-N and it offers WEP and WPA, Not WPA-PSK (also known as WPA2).
Also the IP address of the router should be
http://10.0.0.2 with username: admin and password: admin
If you can set the new laptop to use WPA encryption you may be OK or you will have to use the old WEP. WEP is much less secure and easily hacked in a matter of minutes but if you live in a remote area and your only neighbors are sheep then it may not be that important; or you may want to invest in a relatively inexpensive Wireless-N router (we can get slower models for about $25 US and we pay $60-120US for dual-band with the higher money being for 300MB/s)