If your progress of daily challenge are not tracked, you need to do following.
1. Access to Ubi Connect by PC or Smartphone.
2. Link off your PSN Account from Ubi Connect.
3. Turn on Splinter Cell: Blacklist on PS3.
4. Sign in Uplay after starting Splinter Cell.
* If don't show log in menu of Uplay on Splinter Cell, you need to wait a few minutes.
5. Play daily challenge.