No matter what UHRS hit I choose it says there are no hits.

I've created my account 4 days ago and I have completed at least 10-15 qualify tasks, which I passed, but when I try to do those hits it says there are no hits. Are there tips and tricks in order to get to do a hit? My total earnings on UHRS are 1.4 dollars so far and I think I've only done about 30 hits (in the first day I managed to do some). What should I do in order to get more hits?