Thank you for waiting. There are several problems that can cause a drooping crown. Watering from above can cause rot, and this species doesn't tolerate a lot of water from above. With this type of watering in combination with a certain fungus, a condition called crown drop can result. This starts with a hanging crown such as you're seeing, and then the whole crown falls off. If that's what it is, there is no cure.
However, there are other possibilities. These palms do better in Florida than they do in California because the climate is better for them there. To successfully grow them in less than optimal conditions, they need to have everything just right. Deficiencies of manganese or magnesium can cause the crown to droop. You didn't mention fertilization so I suspect the tree hasn't been fertilized. This species is a heavy feeder and needs lots of fertilizer. At a garden center or nursery, you should be able to buy a good palm fertilizer that contains these elements. The Fertilize the tree, and when you water, water at soil level rather than from above. Fertilization will not cause an immediate improvement because it takes time for the nutrients to get into the tree.
Too much or too little water can also cause drooping. Damage or disease to the roots can also interfere with water and nutrients being transported up to the leaves, but without seeing the tree, it's not possible to determine the exact cause of the problem. I recommend that you call your County Extension Agent. This is a government problem and there is no fee for their services. They usually have Master Gardeners on staff to help. If you go to the following website and click on your county, you can get contact information for local help.http://camastergardeners.ucdavis.edu/California_Counties_MG_Websites/
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