Unable to install FlashPlayer !

I tried these on the commandline, and remembered to do "su" first:

knoppix@Microknoppix:~$ su
root@Microknoppix:/home/knoppix# aptitude install flashplugin-nonfree
E: The value 'wheezy' is invalid for APT::Default-Release as such a release is not available in the sources
E: The value 'wheezy' is invalid for APT::Default-Release as such a release is not available in the sources
root@Microknoppix:/home/knoppix# aptitude install flashplayer-nonfree
E: The value 'wheezy' is invalid for APT::Default-Release as such a release is not available in the sources
E: The value 'wheezy' is invalid for APT::Default-Release as such a release is not available in the sources
root@Microknoppix:/home/knoppix#

Any idea how can I install flash player, then ?

The Knoppix version is this:

http://lame.lut.fi/icons/unknown.gifKNOPPIX_V7.0.3CD-2012-06-25-EN.iso28-Jun-2012 11:27 693M


http://lame.lut.fi/linux/Knoppix/KNO...2-06-25-EN.iso

download the Flash player on the Adobe.com (.tar.gz) and uncompress it - create a "plugins" directory in your ~/.mozilla - copy the libflashlayer.so you got in the archive into this plugins directory - then sudo cp -r usr/* /usr with Chromium/Knoppix 7, it's even easier

unfortunatly it seems Adobe won't upgrade this Flashplayer and some videos on Youtube are already not working...