check that the 'x' attributes are set with "ls -l".

do
sudo /full/path/to/command
as user knoppix.

or in the root shell
/full/path/to/command

it is not really neccessary to give the full path, you may also give the relative path. if the program is in the current (working) directory use "./command".

hmmm, hope this helps,
fred.