gever09,

Considering I show two posts for the same subject, I will pick this one to post a reply on...

First question I have for you...

Are you running Knoppix from the CD-ROM?

If you are, then, my answer to you is: You will get a access denied if you attempt to install a program and all you are doing is running from the CD, because you can't write to a CD-ROM. Now, if you have installed Knoppix to your hard drive, or if you have setup Knoppix to write to your hard drive, that is a different story.

But, your original post, does not state if you have setup Knoppix on another form of media other than the CD that Knoppix is distributed on, so, I assume, you are running it from the CD...

More information may help on further diagnosis...
Cuddles