Knoppix 3.4 boots nicelly but 5.1.1 wont boot Help!

Please Help I been using old versions but im not expert

I downloaded unrared and burned it as data CD twice using Nero 7 first time I included all the files that came outside of the main Winrar file. I though, that maybe that was the problem so second time I only burned the contents of the main Winrar file still no success.

Win XP, Pentium 4, 2GHz, 512 RAM,80Gb HDD with 40Gigs still free, video SIS 300, 305, 360, 540, 720.
Knoppix 3.4 and 3.7 boots nicely but 5.1.1 wont boot I even change setup so it would only boot from CD but it’s not even recognized.

I tried on another Pentium 4 with: 512 RAM, with more than 66Gb of free space,Intel(R) 82845G Graphics Controller but same results.
maybe im burning wrong or there's something

There is no winrar file. Read the downloading faq and follow the instructions to burn the disc properly.