melitta caffeo passione_no coffee spillage

I have a
problem with the flow of coffee in the tank,
when I start the coffee, a few drops fall on the side of the group inside, and in the end a large amount of water is evacuated by the drain under the valve.
I have however changed the valve, which is new,

any idea on the cause?

hello
, continuation of my problems:
I
had succeeded in making the machine work again, after disassembling, reassembling the valve and the chamber 1
week later I disassembled the extraction chamber for weekly cleaning and after reassembling, again, no flow of coffee,
the rinsing is done
I have the impression that the problem comes from the chamber, what can I check at this level? joint to be changed?

Hi Did you sort this problem. We have a brand new machine and no coffee flow ????