I just finished a looooong survey, and I had opened another page as instructed. I copied my code #, and I go back to MT to enter the code, and get this msg., "The hit you were viewing has expired"!! I had plenty of time, and never ever get close to the time limit the requester allots. This is so frustrating! I can't contact the requester, because this hit is no longer visible. Why isn't there a link to revisit your most recent HIT?? Going to the "hits assigned to you" only gives me the msg., There are currently no hits assigned to you. Geeeezzz..
Did you accept the HIT before working on it ? Generally it should not happen, if you have accepted the HIT before starting the work. However, I faced similar problem earlier once with Dolorers Lab.