Have had problems with playing DVD+RW in Hitachi player - resolved when I realised Nero was giving the copied DVD a "booktype" of "DVD-ROM" rather than "DVD+RW". Ahead (Nero) state in their software help that this gives better compatibility, but obviously not in my case.
As the 985 is a slightly older unit, it may expect the "DVD+RW" flag rather than "DVD-ROM". Try disabling the feature in Nero that always writes a "DVD-ROM booktype (can't offhand remember where it is - probably in preferences or copy options). Not sure whether Ulead does it also. Just an idea.