Beat Designer toubleshooting

I’ve used the beat designer plug-in in groove agent before, for some reason now it’s not working. I’m just not getting any sound at all. When I load the plug-in , it pops up like normal, i able to add beat but there is no sound. I’ve deleting the track and adding a new one and there is no change. What’s the problem?

Can someone give me a step by step on how to solve my problem?

thank you!