413 request entity too large

[cyon_sb]

If a client tries to edit the description of one of his galleries, the following error occurs:

Error! Operation has not been completed.

I checked http://kb.odin.com/en/5503 and added "LimitRequestBody 10485760000000" to our httpd.conf wich didn't help.

The detailed Logs in the Admin Panel say:

Details #100782
Creation date 4/8/2009 5:55:27 PM
Level Error
Source Modules
Source Modules
User name admin
IP address 81.xxx.xxx.xxx
Requested URL /Wizard/Edit/Modules/ImageGallery/Category/Update
Referrer URL http://sitebuilder.url.tld/Wizard/Edit/Modules/ImageGallery/Category/Edit?id=10
User agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.8) Gecko/2009032608 Firefox/3.0.8
Message Invalid server response: http/1.1 413 request entity too large
date: wed, 08 apr 2009 15:54:46 gmt
server: apache/2.2.9 (unix) mod_ssl/2.2.9 openssl/0.9.7a mod_auth_passthrough/2.1 mod_bwlimited/1.4 frontpage/5.0.2.2635
content-length: 620
connection: close
content-type: text/html; charset=iso-8859-1



413 request entity too large

request entity too large
the requested resource/server.php
does not allow request data with get requests, or the amount of data provided in
the request exceeds the capacity limit.
additionally, a 404 not found
error was encountered while trying to use an errordocument to handle the request.

and

Details #100783
Creation date 4/8/2009 5:55:27 PM
Level Error
Source System
Source System
User name admin
IP address 81.xxx.xxx.xxx
Requested URL /Wizard/Edit/Modules/ImageGallery/Category/Update
Referrer URL http://sitebuilder.url.tld/Wizard/Edit/Modules/ImageGallery/Category/Edit?id=10
User agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.8) Gecko/2009032608 Firefox/3.0.8
Message Action status: 2; Target: /Wizard/Edit/Modules/ImageGallery/Category/Edit; Messages: Error! Operation has not been completed.

Does anyone have an idea on how to fix this?

Many thanks in advance!