Try letting the out of date wallet sync, then send it to your new address.
Try importing the wallet.dat file. (Should be in your appdata folder).
If they dont work, get your privatekey from the out of date qt'
launch your bitcoin client as usual and wait for it to load the blockchain and start up
click on 'help' in the menu bar (top right)
click on 'debug window'
select the 'console' tab
type: walletpassphrase "your walletpassphrase here" 600
type: dumpprivkey [your public key here]
this will return the private key, you can copy it now; ensure you clear your clipboard/history afterwards
Bitcoin tutorial but should still work, then import it into your new synced wallet. Let me know if you crack it, cant really think of anything else.