Board Died when upgrading to 3.5.2 !!! Help

[Professor_Lee]

Uploaded the new 3.5.2 files and re-edited config.php as asked. All done.
Ran upgrade.php went through all 5 steps ok, no probs
Logged into admin when comes up, into admin no probs

BUT Forum itself gives this now!

[B]Warning[/B]: main(/usr/local/psa/home/vhosts/rccgb.co.uk/httpdocs/forums/includes/functions_calendar.php): failed to open stream: Permission denied in [B]/index.php[/B] on line [B]151[/B]

 [B]Fatal error[/B]: main(): Failed opening required '/usr/local/psa/home/vhosts/rccgb.co.uk/httpdocs/forums/includes/functions_calendar.php' (include_path='.:/usr/local/psa/apache/lib/php') in [B]/usr/local/psa/home/vhosts/rccgb.co.uk/httpdocs/forums/index.php[/B] on line [B]151[/B]

http://www.rccgb.co.uk/forums

Please help, cant see whats gone wrong here, all i done was follow upgrade to the tee

[Professor_Lee]

Also as its "calander" area, i went into admin cp calander controls and get same similar errors in admin

[Professor_Lee]

Sorted it !!

Bizarre reason FTP uplaoded all files bar the one with correct CHMOD,
the functions_calander was set at chmod 0 ?? odd but fixed