Hey bro, that's happened to me as well.  You can try two different ways of fixing it.  The first is going into the Debug and resyncing the entire blockchain.  The second option is to save your wallet.dat file, and take it out of the Lizus Wallet folder, put it someone safe for now, say your desktop.  Then delete the whole Lizus folder.  Now DL and reinstall a new Lizus Wallet, after it's fully synched with the blockchain, close the wallet, and delete the new wallet.dat file that was created in the new Lizus folder.  And finally put back your old wallet.dat file into the new Lizus folder in (%appata%), and start up the new Lizus Wallet.  This should solve your issue.  Please let me know if you need further help.

mimagneto