DVDs Still Not Playing

[MARP1961]

I have still not succeeded in getting my Region 2 DVDs to play in Ubuntu 10.04. I used something called Regionset to reset the player from zero to 2 for playback in the UK but although it is now set to Region 2 it will only play Region 0 DVDs. I have tried all sorts of tricks with codecs and installing VLC and (of course) Ubuntu Restricted Extras but no joy. Any ideas anyone?

[gandaran]

do you have libdvdcss2 from medibuntu installed?

[MARP1961]

Many thanks for your suggestion. Yes, I thought I did; but after visiting the medibuntu link, I think I have some more things to try first. I'll let you know if this works.