404 error while downloading

weird this error was not there before, but when i try to download sitemap i am greeted with 404 page , same error i see in webmaster tools, any solution ?

What's your htaccess content ?

Please make sure your vbseo_sitemap/data folder is chmod 777

Also please note that we don't support vB Enterprise translator. If you applied any file edits to vBSEO files ( including .htaccess file ) please try reverting all the changes you applied.

You should also try upgrading to vBSEO 3.5.1

yes it was issue with vbet rules, changing some positions in .htaccess now sitemap download is working,but can you guys please tell me what this rules in .htacces does ?

Code:

RewriteRule ^((archive/)?(.*\.php(/.*)?))$ vbseo.php [L,QSA]


RewriteRule ^(.+)$ vbseo.php [L,QSA]

That's vBSEO rules, We don't advice our customers to use vB Enterprise translator and you will need also to revert all of your changes in vBSEO files to get vBSEO functional correctly.