I also wrote a purse Checkpoint is too old
Sorry for your issue my friend. Please take the following steps to correct the checkpoint warning:
1. Close your client and go to your AppData/Roaming/CryptogenicBullion folder.
2. Delete blk0001.dat, blkindex.dat, and peers.dat in your data folder.
Do not touch the wallet.dat file or else you'll lose your coins.3. Restart the client and you should see the client downloading the blockchain.
4. Once the blockchain has downloaded, you will no longer see the warning.
I would only add that if in the very rare case this doesn't work then deleting everything in your AppData/Roaming/CryptogenicBullion folder
your wallet.dat and config file in step 2 should work.