as expected the LED wiring was wrong.
doing it right: works.
a little Question about this: for driving 2 LEDs the circuit schema at your manual say to connect the LED from VIN (means positive input power direct from the power supply?) to SV1 PIN4 ... so i can see it on the board layout this is "HV OUT" should it not be the SV6 PIN4 as "Thick LED"-connector?
also the 4 LED drive runs from SV5?
in the meantime i was trying around snd read many other helpsites about nixies, also the INS-1 neon bulb.
so i finished the work and complete the clock, it works fine but the wiring is horrible ... but works