I'm totally new to Electrum. I searched online and setup an old version of it (ver 2.4.1). I then had a deal with a guy, he agreed to send me 10 coin.
I gave him the address of my Electrum wallet. BUT JUST UNTIL THEN, I REALIZE THAT I CANNOT GO ONLINE.

I checked the Block Explorer of the Address and realized that the transaction was done but in the Electrum wallet, balance was still 0 ('cause it would never be online  ). I tried to down a newest version of Electrum, using the old seed but the coins would never come back again  .

Do anybody know how to take back the coins, i'd really, really be thankful if there's some suggestion.