Permission problems on upgrade

Hi



I am trying to upgrade my live site, but I get the message :



Warning: mkdir() [function.mkdir]: Permission denied in /var/www/vhosts/capitalcaterers.co.uk/httpdocs/core/fn.fs.php on line 114



I have set permissions for the directory /core and the file fn.fs.php to 777, and but this doesn't help. I don't understand why this is happening, as i have upgraded my development site (which is in a subdirectory of my main site) and made changes to it, without any problems.



Any help much appreciated.



Regards



Mike

Sorted - I deleted the upgrade files in var/upgrade, and now it works.