Need help to recover my transaction of "UNKNOWN"

[skystone]

Thanks,i've check it already. The last command 'wallet_recover_transaction txid' didn't work.

[xeroc]

try this:
http://wiki.bitshares.org/index.php/RecoveringFunds#Regenerate_account_transaction_keys

[skystone]

One of my transaction is sent to UNKNOWN,  and i haven't received it yet.
Transaction info:

>> get_transaction e9912f57

TIMESTAMP           BLOCK     FROM                TO                  AMOUNT                  MEMO                                        FEE                 ID     
======================================================================================================================================================================
2014-09-05T06:45:40 404341    land0             UNKNOWN             998.00000 BTS                                                    0.10000 BTS         e9912f57

wallet_recover_transaction seems have some mistake:

>> wallet_recover_transaction e9912f57

10 assert_exception: Assert Exception
key_record.valid() && key_record->has_private_key():
    {}
    bitshares  wallet.cpp:2204 bts::wallet::wallet::recover_transaction

    {}
    bitshares  wallet.cpp:2254 bts::wallet::wallet::recover_transaction

    {}
    bitshares  common_api_client.cpp:2003 bts::rpc_stubs::common_api_client::wallet_recover_transaction

    {"command":"wallet_recover_transaction"}
    bitshares  cli.cpp:556 bts::cli::detail::cli_impl::execute_command

Could somebody help me to find out the problem?
Thanks!