guestbook error

[jack schouten]

I installed the guestbook. When i try to enter as new message i get this errors
Warning: JLoader::include() [function.JLoader-include]: Unable to access /storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/libraries/joomla/ mail/helper.php in /storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/libraries/loader. php on line 83

Warning: JLoader::include(/storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/ libraries/joomla/mail/helper.php) [function.JLoader-include]: failed to open stream: No such file or directory in /storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/libraries/loader. php on line 83

Warning: JLoader::include() [function.include]: Failed opening '/storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/libraries/joomla /mail/helper.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/libraries/loader. php on line 83

Fatal error: Class 'JMailHelper' not found in /storage/mijndomein/users/098712/public/sites/www.jms-fotografie.nl/components/com_ph ocaguestbook/controllers/phocaguestbook.php on line 148


Can you tell me what is wrong??

Tnx,

Jack Schouten

[Jan]

Which version of Joomla 1.5 do you use? You need RC4

Jan

[jack schouten]

Jan,

I do use the latest version of Joomla. Version 1.5.0.

Jack

[Jan]

Which release: RC 4... In RC 4 there are listed files which your Joomla! cannot find in your site.

Jan