I don't have one. But, off hand, you might try a different brand of cappuccino. The one you have might be lacking the body & oils a better brand might have. You might also have the temp to high, so it's turning it into cappuccino too fast and not letting the beans steep enough to release proper, subtle flavors. OR, you could have the temp too high and a lot of flavor is coming out, without the subtle richness.
As for the milk, are you using the coldest milk possible? Put it in the freeser for a while before frothing. Also try low fat or skilm milk. They usually froth better. Alaso, make sure you froth from the bottom up. And pump the milk up and down around the steamer. If you just froth the top layer, it won't get very frothy.