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First, I'm not a heating and cooling guy so forgive me if I ask obvious questions. Everything I have learned about heating is off the internet. I installed a high efficiency boiler in my parents home where they once had a traditional boiler system. The boiler I purchased stated that I should make a primary/secondary system so I bought Dan Holohan's book and set out to change the Direct connection piping into a three zone primary/secondary system. I fired up the system yesterday and the primary system seems to heat up just fine but only the first zone seems to work. All the circulators work but the remaining two zones stay cold. As I get that this is all very complicated so I put together a short attachment of how I set the system up. Is there something obvious that I'm missing here? Any help would be greatly appreciated!