NMS {$preferences} - using link as a user causes 404

[map_1961]

Hi forum..

On a cmsms 1.11.13 installation / nms vers. 2.9.5. we use the NMS tag {$preferences} in the newsletter template to open the oportunity do unsubscribe.

1. If i hit this link in a test newsletter i get 404 - page not found.

2. I checked the urls:
The link in the newsletter mail to change preferences is:

http://url-of-the-page.de/NMS/15/settings/ceb6262408d4669f33f81d148d14a23f/

(with ceb6262408d4669f33f81d148d14a23f is the unique code of the newsletter user)
does not work and brings the 404 error.

3. However a second mail (a confirmation mail) is sent out by the nms module - no matter that the 404 appears on first hit. In this second mail - it's a confirmation mail - is a further link to change preferences:
http://url-of-the-page.de/NMS/57/settings/ceb6262408d4669f33f81d148d14a23f/

This link (with the ../57/..) works fine.

The only difference in the second link is the .../NMS/57/... instead opf the .../NMS/15/...

Who has an idea about the problem???

Thx

map_1961