admin page setup error

[planner]

Folks,

I have just installed Plans and have it working fine. Now I've followed the instructions to have a separate admin page as given on the plans site. I can still access the public page, but attempting to access admin page spews out this error on the browser:

[an error occurred while processing this directive]

My apache error log has these lines:

Premature end of script headers: /../calendar/admin/plans.cgi
invalid CGI ref "/500.php" in /mysite/500.shtml

The version of plans is 7.6.2, running on a Linux kernel 2.6.9-22. User OS is also Linux and the browser is Mozilla Firefox

This site is not yet live.
Any clues?

TIA

[planner]

[planner]

I'm hoping someone on this forum has a solution or at least a suggestion for this problem.

The link to the public site for the calendar is:

http://www.eckankar-tx.org/Dallas/calendar/plans.cgi

This link works fine. It is the admin site that doesn't work and gives the error. Your help will be greatly appreciated. The admin link is:

http://www.eckankar-tx.org/Dallas/calendar/admin/plans.cgi

[planner]

I'm still trying to figure out how to make the admin calendar work. In addition to the error from the initial post, here are warning messages from the output of "perl plans.cgi":

<b>Warning:</b> The email reminders data file: data/email_reminders.xml is not writable.
<b>Warning:</b> The calendars data file: data/calendars.xml is not writable. The add/edit calendars tab won't appear
unless this file is writable.<br/>
<b>Warning:</b> The pending actions data file: data/pending_actions.xml is not writable. The add/edit calendars tab won't appear unless this file is writable.<br/>
<b>Warning:</b> The events data file: data/events.xml is not writable. The add/edit events tab won't appear unless this file is writable.<br/>

The output of ls shows that all files in question are writable by everyone:

vahana:# ls -l admin/data

-rw-rw-rw- 1 vahanafo vahanafo 4322 Mar 18 09:02 calendars.xml
-rw-rw-rw- 1 vahanafo vahanafo 0 Mar 15 01:57 email_reminders.xml
-rw-rw-rw- 1 vahanafo vahanafo 29755 Mar 15 01:58 events.xml
-rw-rw-rw- 1 vahanafo vahanafo 0 Mar 15 01:57 new_calendars.xml
-rw-rw-rw- 1 vahanafo vahanafo 0 Mar 15 01:58 pending_actions.xml
-rw-rw-rw- 1 vahanafo vahanafo 0 Mar 15 01:58 users.xml

Observe that all files are writable. I'm beginning to think that the source of these warning messages and the original error (CGI::session) could be caused by the manner that the files in the calendar/admin directory are soft-linked to the calendar directory.

Does this make sense to anyone?

TIA