When booting Knoppix from the ISO file, the bootng process
1) searches for the ISO file (knoppix810.iso) in the root of the detected file systems
2) if the ISO file is found, it mounts the ISO file on /mnt-system
3) searches for /mnt-system/KNOPPIX/KNOPPIX
4) if /mnt-system/KNOPPIX/KNOPPIX is found to be a cloop file, it mounts this on /KNOPPIX
5) if /KNOPPIX contains the KNOPPIX file system, the boot process switches to this and continues loading KNOPPIX
6) Knoppix runs the initializing process and loads the graphics interface
7) if wired Ethernet is detected, Knoppix connects to the wired Ethernet and uses DHCP to get an address.

Knoppix is now running without your personal settings,so wireless networks are NOT connected. You have to connect it manually to a wireless network.

How far in this boot process do you get ?