First: I'm not an expert with quests, hardly do any, so take my words with caution and not as a certain truth.
If you gave the sword to Trasok, and Trasok accepted it, then there are 2 possibilities:
a) The quest finished and you got a reward.
b) The quest has more stages to be completed, and those are the ones to complete from now on.
Both cases can be checked using the "log" functionality that the game has. Go to your planeshift folder (program files/planeshift crystal blue , usually) and check the logs subfolder. There it should be a plain text file holding all your conversations. With fortune, scrolling down you'll be able to seek your conversation with Trasok, and see if either the quest was finished when giving him the sword, or if there are more steps to do, reading the dialogue with him again. (You can also try a search with Trasok tells you, I'd say, and begin the search from the end of the document up, so it shows the last results first)
If the quest ended, then you should have the reward or whatever it's meant to give, and if not, there you'll find the next steps that you'll have to follow.
If you did not complete the giving action, but the sword's no longer in your inventory... well, then maybe you'll need to restart the quest again, and that can be tricky.
Just search on your logs to see what happened.