Error in sitemap

I received this error:

Warning: fopen(/var/www/vhosts/fituncensored.com/httpdocs/forums/vbseo_sitemap/data/downloads.dat): failed to open stream: Permission denied in /var/www/vhosts/fituncensored.com/httpdocs/forums/vbseo_sitemap/vbseo_getsitemap.php on line 40

Warning: fwrite(): supplied argument is not a valid stream resource in /var/www/vhosts/fituncensored.com/httpdocs/forums/vbseo_sitemap/vbseo_getsitemap.php on line 41

What can i do?

Thanks

Make sure that you have set permissions to 0777 data/ and 0666 for data/downloads.dat file.

Thanks Oleg

Don't work, maybe because i've not uploaded the htaccess file?

But if upload it, the forum don't find the urls(i've installed vbseo too).

Thanks.

Ok, now is working.
It was a bug in my server

Great