The only thing he wanted was to check I have enough BTC to buy his LTC. So I sent 0.01 BTC to his address to show him I have the amount.
Did he ever had access to you computer? Did you send the 0.01 BTC from his computer? I would suggest to provide more information and post in Technical Support.
Promotion: Next 100 people to post their new PrimeDice user ID will have 0.01credited to their PD account. I credited someone 0.01 earlier and they turned it to .5 already!