I am using Geth as a provider to the blockchain. I perform JSON-RPC method send_Transaction to transfer tokens, it returns me hash of the transaction but I can't see this transaction in the Etherscan. When I call method eth_getTransactionByHash, it return result: "blockHash":"0x0000000000000000000000000000000000000000000000000000000000000000","blockNumber":null. Geth logs don't show any errors.
Transaction with same parameters are succesufully sent before. When I try to send similar transaction into Ropsten blockchain, all do succesfull.