Make sure you have the capitalization the same as you originally did in your Keyhotee name, along with all the other brainwallet fields. Do you know how old the Keyhotee version you generated it on before was?
If it's in the BTSX Genesis block, you can also use the BTSX wallet to regenerate it from the console:
wallet_import_keyhotee <firstname> <middlename> <lastname> <brainkey> <keyhoteeid>
Hope this helps...