I have recently installed JoomDOC on my Joomla 1.7 based website, but I am getting the following errors:

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home3/trajan/public_html/ogpnetwork.com/clients/libraries/joomla/database/database/mysql.php on line 282

Warning: Invalid argument supplied for foreach() in /home3/trajan/public_html/ogpnetwork.com/clients/administrator/components/com_joomdoc/libraries/joomdoc/filesystem/folder.php on line 293

Also, it will be helpful if you can guide me in installing libraries such as pdf2text and catdoc, which are required to enable complete search of the contents (eg. inside PDF, Docx, PPT, etc.) of all files in the archive.