The game checks for the items as soon as you walk into the outside door to the first summoning test rooms. Make sure you dropped them outside the room, also make sure that they are all picked up by the HERO, the DK sometimes gives problems with the quest items for this test.
If you ave installed the patch just before the summoning test, quicksave (or save under a different name) your game, then load the newly saved game again. (This changes the saved game to the new version of the patch, so to speak "activating" the patch).
