preventing the client to resend transaction (double spent!)

I have a strange situation.

My original client is trying to send a transaction every 30-60 min.
This is a double spend.

It happened in this way:
- I had 5 BTC in an hash
- I sent them all to an address with a transaction. This was sent and i tourned off the client after some seconds.
I could see the transaction on blockchain.info
- After some 15 minutes i started the client and i saw no pending transaction and the coins still present, so i sent again to the same destination address the btcoins.
- Another 2-3 minutes and i closed the client again.

After some time (hours) and now days - nothing has changed i started the client again and:
- the first transaction was included in a block, so that the total amount is now 0
- i see the client with the second pending transaction (that is a doublespend and it can't be spent as i see 0 in the client)
but watching the log i see the client tries to send the transaction again.
and again after another 30-60 min.

HOW TO 'reset' the client / (0.8.0) ?

i tried with:
./bicoin-qt -rescan
but nothing has changed

what should i do?

Topic: preventing the client to resend transaction (double spent!) (Read 573 times)