my troubleshooter.php show following system configurations:
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* PHP version: 5.2.6 (Should be PHP 5.0.0 or above)
* PHP Safe Mode is off
* eTicket version: 1.7.3
* Webserver: Apache/2.2.8 (Fedora)
* Database: MySQL 5.0.51a-log (Should be MySQL 4.1 or above)
* GD is not installed, CAPTCHA will not work.
* Multibyte String is installed
* iconv version: 2.8.90
* IMAP is not installed eTicket will not work correctly if you use automail.php.
* Socket support enabled.
* User Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.

Gecko/20071030 Fedora/2.0.0.8-2.fc8 Firefox/2.0.0.8
* Character set: UTF-8
* Link: http://localhost/eticket73/troubleshooter.php
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I believe GD and IMAP should not affect the problem I encountered, right?