mail rules not working

I use Mail Rules to forward messages WITH their attachements to small workgroups of 6-8 persons.

Now I experience this problem: The attachements are NOT forwarded!!!!

If I forward a message manually, choosing "forward" from the menu, it works.

With the rules function only one attachement (a "jpg" Logo from the former sender) is forwarded, the other attachements are NOT forwarded.

This ist just unbelievable, because this kind of rule worked fine until now.

Thank you for help!
I hope I don't have to MOVE TO MS EXCHANGE to have profesisonal mail services.