Hi Vlaminck,
I just spent the past week pulling my hair on what sounds like the same (or similar) bug/issue. See this thread over at DMS forum for more information on how I solved it (or at least I hope so still testing!)...
http://www.digitalmindsoft.eu/forums...hp?f=10&t=5144
Hope it works for you to and that the dev's take note and fix this bug/issue in next patch.
/KC