It looks like you are using the right wallet version; I would guess that there might be some type of issue with the wallet file.  I would check the block explorer to make sure of the amount of coins at each address and then if it shows correctly use the “dumpprivkey” and “importprivkey” commands in the debug console to restore the coins in a new wallet.  (If you can get the “dumprivkey” command to run on the wallet that won't load.)  If not, you could try to use an old backup that loads fine and that might be good enough to run “dumpprivkey” to get the private key information out so you can restore your coins.

Best of luck!