Send to rich text editor: worng path missing WBFM root folder

Hi, I configured WEBFM like this:

2 roles (admin, editor), the first one with full admin rights and the second role with only access right.
I set a root folder for web file manager in the setting page as "webfm", so:

/sites/default/files/webfm

Then form my editor role I set the root in a nested folder inside webfm's root, so the tful path resulting is:

/sites/default/files/webfm/editor

I am using also FCKeditor and with the first role all is doing fine. However there is an issue for the second role, that is: when I want to link a file from inside FCKeditor, the webfm popum window loads fine, I select the file and then the option "send to rich text editor", but the path sent to the editor is missing the webfm root, so resulting in a broken path.

by example, if I have a file myfile.txt inside editor directory, the path sent to the editor is:

/sites/default/files/editor/myfile.txt

instead of

/sites/default/files/webfm/editor/myfile.txt