yet another 500 error

[OBESSU]

I just started using WB for my organisation, but I didn't create the website nor am I an expert of WB. On our news section, whenever I click on "Read More" I get:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@obessu.org and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

I already tried to change the permission from 777 to 755 and even 744 in the settings tab but it does not seem to change anything.

WB Version 2.6.1
Apache/1.3.39 Server
Homepage: http://www.obessu.org
OS: WinXP

Thank you for your help

[ruebenwurzel]

Hello,

look in the pages/posts folder if there are the files for the news.

Matthias

[OBESSU]

Hello Matthias,

I have already checked in the previous topics, I wouldn't double post, but there is nothing apart this "change permissions to 755" advice that does not work here.
Since I was not in charge of the website before last month, I don't know what has been done or not. All I know is that all posts before January 08 are fine and display OK, the following one give me this error message.

The point is I really don't know anything about WB and have been checking everything from the templates to the settings without finding a clue.

Thanks for your very quick answer by the way!

Jonathan