I have wallet which is stuck.

- Old blocks, old wallet, balance is OK but hangs at block 751 (like the others)
- New blocks, old wallet, balance is zero, which is not good. But Sync is ok

I've tried several times to delete everything except wallet.dat. Then copy
the bootstrap (both versions, bootstap2.1.zip contains 2 bootstraps).
But no success. Repair wallet states there is nothing wrong.

The last scenario I tried was firing up the old wallet with old blocks
and send via transaction buzzcoins to a totally new wallet with new blocks.
But the transaction is never sended.

How do I proceed? I like to have my coinds back and be able to transfer them.