I get these messages from a newly installed module:

Warning: main(XOOPS_ROOT_PATH/header.php) [function.main]: failed to open stream: No such file or directory in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 30

Warning: main() [function.include]: Failed opening 'XOOPS_ROOT_PATH/header.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/lib/php/PEAR:/usr/local/share/pear') in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 30

Warning: main(XOOPS_ROOT_PATH/class/xoopsmailer.php) [function.main]: failed to open stream: No such file or directory in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 31

Warning: main() [function.include]: Failed opening 'XOOPS_ROOT_PATH/class/xoopsmailer.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/lib/php/PEAR:/usr/local/share/pear') in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 31

Warning: main(XOOPS_ROOT_PATH/class/pagenav.php) [function.main]: failed to open stream: No such file or directory in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 32

Warning: main() [function.include]: Failed opening 'XOOPS_ROOT_PATH/class/pagenav.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/lib/php/PEAR:/usr/local/share/pear') in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 32

Fatal error: Call to undefined function: xoops_cp_header() in /hsphere/local/home/chnabg/chnabg.org/modules/xpetitions/admin/signature.php on line 298

Other modules run fine. Help if you can.