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Ok then lets start this over. First off the foam is being caused by air in the system. This could be from a leaking oring or improper bleeding of the system. Here is the proper way to bleed this car, I would try this and if it still continues to have the foam, you are going to need to start to look at all of the fittings for a possibly air leak. This could be as simple as a split o-ring. Anway here is how you should be bleeding this system.
Leave the cap off.
With an assistant checking the level and the condition of the power steering fluid, turn the steering wheel fully to the left and fully to the right at least 20 times.