sef advance with joomla 1.5.x

Hi, I am preparing the migration of my joomla site 1.0.x to jooma 1.5.x. in the new site I have installed sef advance 2008 and I have imported the backup of the old site, but it doesn't work. the file.htaccess must be modify or it is all right original?

thanks

What exactly doesn't work? Just saying doesn't work doesn't help. Which error do you get, which URLs you see?
As for .htaccess, one that came with Joomla 1.5 should work.

in joomla 1.0.x I have this url : /Le-notizie/Ultime-notizie/In-arrivo-il-successore-del-KE850-Prada.html

in joomla 1.5.x I have this url  :/index.php?option=com_content&view=article&id=321:in-arrivo-il-successore-del-ke850-prada&catid=1&Itemid=68

why ?

why are the url different?

First you have to make sure that build in SEF works. The long URL you have there is a raw URL with no SEF at all.

Looks like SEF is turned off in global configurations.