TinyMCE acces denied (File manager)

Hello all,

I am learning to use TinyMCE for some months now.
I've implemented it about 10 times, flawless (well allmost )

But now i have thise problemems driving me nuts:

I have uploaded:

tinymce
file_manager
FileUpload
file_manager.php
file_manager_config.php

to:

serverroot/subfolder

then i have implemented the code in
serverroot/subfolder/subsubfolder/index.php

The tinyMCE works (bold,underline etc) works fine, i can also upload some files with the file manager no problem there.
But then when i try to insert the picture for example, i get:

- Permission denied (altough i have chmodded to 777)
- Or sometimes without me changing something i can insert pictures, but then when i submit them he removes the subfolder from the picture path.
So for example when my picture is uploaded in serverroot/subfolder/FileUpload/pics/image.jpg when i hit submit button (to put picture on website) he changes patch to serverroot/FileUpload/pics/image.jpg which of course results in an error...

I have used TinyMCE over 10 times, but never encountered this before.
The only difference with previous installs is that this website is put in serverroot/subfoler.
Unfortunatly i cant' put the site in the serverroot folder.

Plz help?

THanks a lot.

MAT87