Cash reward for help retrieving my 0.5 bitcoin
First off: DO NOT send those exact passwords to anyone offering help. Having those passwords may allow them to access and steal your coins. 

If you open your wallet and see a zero balance, that is probably not a good sign if you haven't moved the coins yourself. Look at the history of transactions, and see if there are any that moved the coins to a new address. You need to figure out if the bitcoin has been moved to an address that you no longer control.