I have the xine program installed on my pc but for some strange reason after installation it couldnt play my dvds. An error message comes up saying that their is no plugin to allow it to read my dvd player. So in other words when I put a dvd in it cant see it, but yet if I put a music cd in it plays the music great. How can I fix this and what plugins or programs do I need to get it to play all of my dvds.

Make sure you have (or get) the latest versions of:

libdvdread
libdvdnav
libdvdcss

That should do ya.

edit----

Oh ya,
Make sure your dvd is symlinked to /dev/dvd

I do have the latest packages. How do I symlink my dvd to /dev/dvd

First check /dev to see if dvd is there and if it is, what it's linked to.
If it's not there, you need to know what device your DVD rom is:

primary slave - /dev/hdb
secondary master - /dev/hdc
secondary slave - /dev/hdd

Let's say for arguments sake that it is /dev/hdc:

ln -s /dev/hdc /dev/dvd

Check the Xine configuration to make sure that the DVD device
is /dev/dvd. (I think it is by default)

If that doesn't work, try running Xine as root.

Did you install xine yourself or did you install it with your distribution?

a few distributions use a gimped version of xine that will not allow you to watch DVD's since the CSS for linux is legally questionable. If you install xine with your distro cds try installing it manually. One other thing Iv found is that some versions of libcss that can be found on the internet are corrupt mostly the RPMs so you may try finding a new copy that is a tar.gz and reinstall it, I installed something like two or three different versions of libcss before I found one that worked, unfortunately I no longer have the website I downloaded it from.

As for setting up your DVD device, go into the setup, under the main tab set your permissions to "Master of the known Universe" click apply (you have to click apply after you finish changing things for each tab, if you change tabs before clicking apply your changes will be lost) then click on the input tab and there will be an option that says "dvd_device" insert the path* to your dvd drive press apply and you should be good to go.

*note if your using a DVD/CD-RW drive the path may be /dev/cdrecorder and not /dev/dvd

Xine didint come with the distro, im installing from rpms so like you said the problem might be that they are just corrupt. Thanks for all the useful info.