The fatty liver slows down the flow of bile so much that you can't flush the gallbladder of stones. The disease is called Non Alcoholic Fatty Liver Disease (NAFLD). If you've had it for a while the liver becomes damaged. The bile gets slower and the gallbladder doesn't fill and empty properly. It fills with stones which irritates the gallbladder wall which thicken.
You can read about what causes NAFLD by typing the phrase into any search engine.
You will then need to clean the liver and get some bile flowing before the gallbladder start working.
It could take 20 Liver Flushes and support herbs such as Chinese Bitters to clean the liver and gallbladder.