if the boxes of the main screen are white the daqd process will not start. It automatically stops if the frontend code isn't running as it is configured to wait for the right DCU to be up (in that case the only DCU in that system IS the frontend, so it can't be started). Any messages while compiling the stuff? Any errors?  My suggestion: save the current simulink model in a save place, take the last, known to be working version and do all the compiling and see if everything starts. If yes you have a bug in your model, if no the way you compile and start the stuff is wrong.

Once the frontend is running, if the daqd still isn't starting try checking the logfile of the daqd process. it's in the /fb directory. Usually it tells you exactly what's wrong...