There are a few things that you can do to get the foam separate on your Mr. Coffee Café Barista.
One is to make sure that you are using fresh coffee beans. If the beans are old, they will not produce much foam.
You can also try grinding the beans finer. This will help them to extract more quickly and create more foam.
Lastly, make sure that you are tamping the coffee grounds down firmly in the portafilter before brewing. This will help create a good seal and produce more pressure which will force the water through the coffee grounds faster and create more foam - if there isn't enough coffee in the filter basket, the machine won't be able to create the necessary pressure to produce foam.
Finally, if your machine is brand new, it might take a few tries before you get the hang of it and are able to produce perfect foam. Just be patient and keep trying! It's well worth it once you get it right.