SEO Urls

Hi
Finally got the htaccess to work but now with another problem, with SEO turned on the url is correctly encoded but when you click on the product it gives me a page saying 'no products found' the same link works perfectly with seo turned off.
Any Clues??

Thanks in Advance

Billy

Sorry to bump this but i really need to figure it out and my php skills are limited.

Sorry the error when i click on any link is 'The page you requested cannot be found.'
With SEO off all works perfectly.
I had to comment out the Options +FollowSymlinks in the htaccess, could this be causing this error?

Solved - Fasthosts dont allow the options +FollowSymlinks in htaccess