Unfortunately nothing happened.
1. If you just run the wallet with (-addnode=91.121.221.51 -addnode=149.28.164.168). Then there is the synchronization, but then the wallet crashes and all.
2. If you copy the wallet file.dat into a new folder and re-sync (-addnode=91.121.221.51 -addnode=149.28.164.168). Then there is the synchronization, but then in my wallet and lost all the coins.
Can you explain further what happens when the wallet crashes? Is it immediate or does it occur after some time? What is the error shown? What size is your wallet.dat file?