Can't produce new tracks after signing with label.

In 'Get Famous', I was mixing, burning and releasing tracks just fine. Then a record label offered a deal and now, when I send that Sim to make a new track, he just mixes on and on and on with no end. I actually had him going for almost 35 sim hours and NOTHING. Then the label called back and threatened to drop me if I didn't hurry. What can I do? It is very frustrating.