Stuck with installing mplayer-plugin

[technossomy]

I am stuck with installing the mplayer-plugin for Firefox that I need to watch asx files.
Here is what I did:
Download and unpack the mplayer-plugin from here: http://mplayerplug-in.sourceforge.net/install.php
The ./configure step indicates I should install the gecko-sdk first, so I download it from here: http://developer.mozilla.org/en/docs/Gecko_SDK
For a lack of configure and make files I leave the SDK unpacked only.
I reconfigure the mplayer-plugin again and this time it says:

Using new (v1.7+) gecko-sdk
checking for GTK... configure: WARNING: *** Running in X mode - Limited Features ***
checking for GTK24... configure: WARNING: Some GUI Features are disabled
checking for GTHREAD... configure: error: Missing gthread package

According to this source I should be installing the ghtread sources:
http://www.linuxforums.org/forum/sus...d-package.html
I tried both apt-get install libgthread-2.0 and apt-get install libglib2.0-dev, but this gave error messages too, such as:

E: Couldn't find package gthread-2.0
E: Package libglib2.0-dev has no installation candidate

Surely it can't be as difficult as that? How do other people do it?

Knoppix 5.0 on a P3, 512MB, 800MHz

Thanks in advance


Tech

[technossomy]

I have also tried sudo apt-get install mozilla-mplayer as has been noted on this forum, but without any success.

By the way, could it be that because Knoppix is a Live-CD it will not install the plugin because there is no place to store it among the firefox plugin folder?

Thanks in advance