QT wallet never syncronizes; often crashes; is locked and not showing attempt to send BTC
Two actions here:


Back up your wallet.dat file


You will most likely find it here, based on these instructions:
https://en.bitcoin.it/wiki/Securing_your_wallet#Windows_2


  C:\Documents and Settings\YourUserName\Application data\Bitcoin
  (Windows XP)
  
  C:\Users\YourUserName\Appdata\Roaming\Bitcoin (Windows Vista and 7)



Update your bitcoin-qt instance to the latest version:
http://bitcoin.org/en/download