Question : How to create XML file from a schema file "XSD"

I have an XSD file. I need to somehow use the XSD to create an XML file based upon the XSD file. How can I do this? You see, I will be taking the XML file and populating the XML nodes programmatically.

Answer : How to create XML file from a schema file "XSD"

1) can you try going to admin, tools, clean cache?

2) are you positive mod_rewrite is working?
to test add this line to the top of .htaccess, your site should go to google:
RewriteRule (.*) http://www.google.com

3) how about SEF withOUT .htaccess (after trying the other two above first)