Likely you did not follow directions to a T.....  Save wallet file..... delete all files in buzz folder in c drive in user in user name in app data in roaming in buzz folder..... then download 2.1 and delete 2.0 buzz qt..... then download bootstrap and extract.... put all files in the buzz folder in roaming...... move wallet.dat file into buzz folder also.... fire up buzz..... you should sync and be fine