Q: iBook G3 "Dual USB" 2001 AirPort Wi-Fi problems

Hello! Before you say anything, I have a newer macbook. The iBook was given to me as a donation, which surprisingly was given to me by a teacher. The computer came with the AirPort card, which supports 802.11b, and I heard that 802.11n would work as its backwards compatible with 802.11b. The problem is that my router's PHY mode says 802.11n. With my MacBook, it's really fast. Now the problem is that when I connect, it only gives me WPA personal, but my MacBook says WPA2 Personal. If I go to options on my iBook G3, It shows the WAP2 Personal, but I will not connect. The Password compromises of Numbers and letters (Example: 1AD23B4C5D), Not words. I tried the Wifi Assistance, But says that my Password is Invalid. The AirPort card works fine, as it connects to a local guest network (which also needs a guest password... go figure) and I would really like to see how well It works with just simple internet uses, as YT is too modern for the iBook G3 to even process a simple video. I looked inside the unit and it has been opened before, so I had to also repair it due to malfunctioning parts which needed upgrading:

10GB HDD to a new 60GB HHD

512MB RAM to 256 RAM, as it was cheaper

CD-ROM to a new DVD/CD-RW optical drive

New full display part

Thats all the replaced parts, all it needs now is a new Battery.

With that aside, any Ideas on how to fix the Wi-Fi issue? As I said, the AirPort card works just fine.