Ok now iam a little bit smarter,never use Jaxx Wallet Software for mining.
This from Jaxx website FAQ
Can I point my mining rig payouts to Jaxx
No, Jaxx is a lightweight wallet that is not designed to receive mining payouts. We do not recommend pointing any mining rig payouts to Jaxx as it...
I have a question about the payout system.
im new at mining on a p2pool and my Balance in this pool is about 1 dash for now.
im using Jaxx Wallet Software and using the Dash adress from this software but i cant see that Balance in the Wallet of Jaxx only in the Dash Block Explorer.