Finally I found the solution, thanks to the Pywallet

Check this topic

https://bitcointalk.org/index.php?topic=35214.0

I checked https://blockchain.info/address/1MJ7U8rd8fofjJ66rWKPjxc1htfZcFknCC but my transaction is not in the list.
I paid 0.0001 BTC as fee for all the transactions.

Please leave the transaction details.

Thank you for your suggestion.
I tried RESCAN by this command:

but nothing happened. All the transaction are still unconfirmed.

Any suggestion...

Yes, your are right about the first one but it is not the case about the other transactions.
So Blockchain confirms the first transaction was successfully but on my wallet it is still unconfirmed !!!

I have had 4 unconfirmed transactions since 10 Feb 2014.
I use bitcoin-Qt ver 0.8.5.
The transaction IDs are not exist in the blockchain.org

{"address": "17zsynejVZjGrSW8tdAmUaCXQRResbfHTB", "category": "send", "amount": -0.029, "fee": -0.0001, "confirmations": 0, "txid": "36f0652a6c0bd99e366cf2f97f4a5f0e011d9254a9af01b80db6062b1387336c", "time": 1392061772, "timereceived": 1392061772 }

{"address": "1ENeVWpZvoAYxnmVDdVQZxLScyxDPkFM49", "category": "send", "amount": -0.00170257, "fee": -0.0001, "confirmations": 0, "txid": "46b248f5bde7138e06f8887119fc2c584826e3ec1af94674d2e13c7046d13307", "time": 1392061778, "timereceived": 1392061778 }

{"address": "1MJ7U8rd8fofjJ66rWKPjxc1htfZcFknCC", "category": "send", "amount": -0.00689454, "fee": -0.0001, "confirmations": 0, "txid": "69ec4d8ed50668ef73acc019ffc1261556f8e54923650b61001234cf532e1876", "time": 1392231247, "timereceived": 1392231247 }

{"address": "1QJLEHo4t3EeAPPHzhChee3DzBShkoUUEC", "category": "send", "amount": -0.04975055, "fee": -0.0001151, "confirmations": 0, "txid": "8bb23dfd324a08eca47ddf9dc44656d862d381b47f8524097627325558d793a7", "time": 1392314941, "timereceived": 1392314941 }

Please someone explain for me what is going on ?
Can I return these amount to my balance again ?
Can I resend them to the network ?
All suggestion are welcome.