Quoted from pedroborges:
Thanks,I change the units/credit parameter to two and I'm still the same with the problem. with units/credits in two to mark credits I have to put both the 50 cent coin and the 1 euro coin twice to mark credit on the machine
Not sure why I didn't see your answer, instead seeing the spam.
Okay - first, I apologize, I thought you were waanting 1 Euro for 1 credit.
So, change the units/credit back to *1*.
And then, if both coins are still only giving one credit, check switch test. Go into switch test, and insert 1Eur coin. See what the game reports happens on your coin switch. If you see two blinks, then good. If you see one, then your coin mech is not set up properly.