Upload Problem (Link-Webpage Dialog)

hello everybody,

info: i have the german-language version, so my error-translation may be a bit different to the english version !!

my system-infos:
- localhost (for test-purposes)
- docroot is 'D:/minixampp/htdocs/'
- FCKeditor path is 'D:/minixampp/htdocs/FCKeditor/'
- win 2k pro
- Apache 2.0.47
- php 4.3.3RC2

menu 'insert-image':
'image-upload and insert' works fine

problem description:
menu 'insert-link'
- i can search the server for links and insert the links via the appropriate sample-dialog
- i can search for upload-files but i cannot upload-files to my server
the windows dialog (popup window) always want's to 'open' or 'save', etc. the file 'upload.aspx' from localhost

this popup dialog disappears when i edit 'fck_config.js' and deactivate/replace
' config.LinkUploadURL = config.BasePath + "filemanager/upload/aspx/upload.aspx"; '
with
' config.ImageUploadURL = config.BasePath + "filemanager/upload/php/upload_file.php" ; '
but then the server sends the error-message
' object not found, url on this server not found, etc. '

- what's wrong with my configuration ?
- where can/must i configure pathes for that purpose ?
- do i need a special upload file for this ?
- if yes, can somebody give an example file, or mail me a snippet/code ?

please help, because this is the best 'wysiwyg online editor' i found so far.
and the best is, it's free. congratulations and thanks to the developper !!

waiting for help. thanks.