Hi i just install Ubuntu 5.10 when i go to the terminal and do sudo apt-get install xine-ui ; totem-xine

I get an error:
Reading package lists... Done
Building dependency tree... Done
Package xine-ui is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package xine-ui has no installation candidate
bash: totem-xine: command not found

The file is missing why do you have it and why dont i have it?
What can i do to make it work?