Troubles with boot 5.1.1 Knoppix. There is followin in the screen:

Welcome to the KNOPPIX live GNU/Linux on CD!

Running Linux Kernel 2.6.19.
Total Memory available: 125092kB, Memory free: 117776kB.
Scanning for USB/Firewire devices... Done.
Enabling DMA acceleration for: hda [IBM-DBOA-2513]
Enabling DMA acceleration for: hdc [CD-ROM CDR_U200]
Lookin for CD in: /dev/hdc


... and nothing more except sound of working cdrom. Box is P1 Dell Latitude notebook. Very old Knoppix (3.3) works fine. Any ideas?