Site URLs Giving Error Message

Hi Dam,

Sorry for bothering again. My site navigation URLs are gone after I changed the SEO settings to search engine friendly navigation URLs in the Global Configuration area of the backend. My objective is to use the URLs as www.halalfriendlyhotel.com/contact . But now it is showing www.halalfriendlyhotel.com/index.php?opt...try_id=94&Itemid=228 . Please help me to resolve this issue immediately.
If I change the URLs to SEO friendly, all the navigation lionks show 404 error message. But If I go for the unclean UIRLs, they appear but not from SEO standpoint, they look ugly.

Please help me solve this problem.

Please include the path to where I should make the necessary changes to the site.

Thanks

Thanks