[syedakm]

In your /forum/includes/functions_calendar.php file:

function construct_calendar_output($today, $usertoday, $calendarinfo, $fullcalendar = 0, $weekrange = '')
{
global $birthdaycache, $eventcache, $bbuserinfo, $vbphrase, $stylevar, $show, $offset, $colspan, $days, $months, $show;

In my actualy file I never saw $show at the end of the line, but I did the edit anyway, could it be the problem I am getting the same error.