Your almost-certain problem is that you don't have that quest "selected" by the QDS. You need to click "mark active quest" or some such in the book, and then right-click the QDS, and THEN send it water.Dunno if this has already been posted, but in 1.1.2 the QDS "deletes"(not extensively tested but i put in 8 saplings and it's 0% complete when it should be 80% complete)water from the Fluid Transposer, making it impossible to complete the 'Sapping the Saplings' quest. Early game at least.
Side Note: anyone know how to get easy water? died of thirst 4 times in a multiplayer server, never even got to iron...
er uber-ninja'd. So slow.