Why does Kppp work with DVD download but not with CD?

[chip.ling]

I downloaded v5.1.1 CD 2007-01-04 EN.iso

You may try the vmknoppix from the Japan team at
http://www.rcis.aist.go.jp/project/knoppix/

Download the English CD version knoppix_v5.3.1CD_20080326_xen3.2.1-20080519.iso

It may not have everything you need but that's the only 5.3.1 CD version I can find so far.

Rgds,
Chip