[TYPO3] creating new page causes the rightside frame to go blank

[B-worx]

Hello,

I have just installed the dummy and source package.

http://www.bworx.be/test/innova/typo3/cms

When I log in on the BE, i have a big problem.
After creating a new page, clicking on the "Create page content" button 
causes the rightside frame to go blank.
Or...

when i want to edit the admin settings, I only get a blank page....

Can somebody help me?

### DEBUG SYSTEM INFORMATION - START ###
HTTP_HOST           : www.bworx.be
TYPO3_HOST_ONLY     : www.bworx.be
TYPO3_PORT          :
PATH_INFO           :
QUERY_STRING        : TYPO3_INSTALL[type]=phpinfo
REQUEST_URI         : 
/test/innova/typo3/cms/typo3/install/index.php?TYPO3_INSTALL[type]=phpinfo
HTTP_REFERER        : 
http://www.bworx.be/test/innova/typo3/cms/typo3/install/index.php?TYPO3_INSTALL[type]=config
TYPO3_REQUEST_HOST  : http://www.bworx.be
TYPO3_REQUEST_URL   : 
http://www.bworx.be/test/innova/typo3/cms/typo3/install/index.php?TYPO3_INSTALL[type]=phpinfo
TYPO3_REQUEST_SCRIPT: 
http://www.bworx.be/test/innova/typo3/cms/typo3/install/index.php
TYPO3_REQUEST_DIR   : 
http://www.bworx.be/test/innova/typo3/cms/typo3/install/
TYPO3_SITE_URL      : http://www.bworx.be/test/innova/typo3/cms/
TYPO3_SITE_SCRIPT   : typo3/install/index.php?TYPO3_INSTALL[type]=phpinfo
TYPO3_SSL           :
SCRIPT_NAME         : /test/innova/typo3/cms/typo3/install/index.php
TYPO3_DOCUMENT_ROOT : /var/www/html
SCRIPT_FILENAME     : 
/var/www/html/test/innova/typo3/cms/typo3/install/index.php
REMOTE_ADDR         : 81.164.187.66
REMOTE_HOST         :
HTTP_USER_AGENT     : Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; 
rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3
HTTP_ACCEPT_LANGUAGE: en-us,en;q=0.5
CONST: PHP_OS       : Linux
CONST: TYPO3_OS     :
CONST: PATH_thisScri: 
/var/www/html/test/innova/typo3/cms/typo3/install/index.php
CONST: php_sapi_name: apache
OTHER: TYPO3_VERSION: 4.0
OTHER: PHP_VERSION  : 4.4.2
imagecreatefromgif(): 1
imagecreatefrompng(): 1
imagecreatefromjpeg(: 1
imagegif()          : 1
imagepng()          : 1
imagejpeg()         : 1
imagettftext()      : 1
OTHER: IMAGE_TYPES  : 15
OTHER: memory_limit : 8M
SERVER: SERVER_PORT : 80
SERVER: SERVER_SOFTW: Apache/1.3.27 (Unix)  (Red-Hat/Linux) PHP/4.4.2
SERVER: GATEWAY_INTE: CGI/1.1
SERVER: SCRIPT_NAME : /test/innova/typo3/cms/typo3/install/index.php
SERVER: PATH_TRANSLA: 
/var/www/html/test/innova/typo3/cms/typo3/install/index.php
T3CV_GFX: image_proc: 1
T3CV_GFX: gdlib     : 1
T3CV_GFX: gdlib_png : 0
T3CV_GFX: gdlib_2   : 0
T3CV_GFX: im        : 0
T3CV_GFX: im_path   :
T3CV_GFX: im_path_lz:
T3CV_GFX: im_version:
T3CV_GFX: im_negate_: 0
T3CV_GFX: im_imvMask: 0
T3CV_GFX: im_combine:
### DEBUG SYSTEM INFORMATION - END ###

Kind regards,

Bram