file browser is empty

i am new to fckeditor. everything seems to be working fine, except for the file browser. if i upload a file, it works correctly, but does not show the links in the file browser. the files on the server are in the right place, etc. the directories are chmod 777. here are my config settings. any help would be appreciated. thanks...

File manager connector:

// SECURITY: You must explicitelly enable this "connector". (Set it to "true").
$Config['Enabled'] = true ;

// Path to user files relative to the document root.
$Config['UserFilesPath'] = '/kb_upload/' ;

// Fill the following value it you prefer to specify the absolute path for the
// user files directory. Usefull if you are using a virtual directory, symbolic
// link or alias. Examples: 'C:\\MySite\\UserFiles\\' or '/root/mysite/UserFiles/'.
// Attention: The above 'UserFilesPath' must point to the same directory.
$Config['UserFilesPath'] = $conf['fck_upload_dir']; {this variable = '/htdocs/www/kb_upload'}

PHP file uploader:

// SECURITY: You must explicitelly enable this "uploader".
$Config['Enabled'] = true ;

// Set if the file type must be considere in the target path.
// Ex: /UserFiles/Image/ or /UserFiles/File/
$Config['UseFileType'] = true ;

// Path to uploaded files relative to the document root.
$Config['UserFilesPath'] = '/kb_upload/' ;

// Fill the following value it you prefer to specify the absolute path for the
// user files directory. Usefull if you are using a virtual directory, symbolic
// link or alias. Examples: 'C:\\MySite\\UserFiles\\' or '/root/mysite/UserFiles/'.
// Attention: The above 'UserFilesPath' must point to the same directory.
$Config['UserFilesAbsolutePath'] = '' ;