i can't sync wallet any node newest ?
There is no new node added, as long as you have added the node in the Appdata file and restarted your wallet it should work. If still it's not working, it's better to clean up wallet other than .dat file reinstall again.
Right and as I said before, better always make a backup of your wallet.dat file, especially when you don't have a lot experience with these things. Always backup!