but i just copied that and past to him. and check everything before sending my address to him
okay, but that doesn't really answer my questions... So i'll repeat them:
1) which wallet are you using
2) are you sure address "3GHTNBPcmeBioGGJiVGsSAZHNsmwGTiPmo" belongs to your wallet
It's a m00t point tough, like bernardos already found out: the funds funding your wallet address in tx 7414460b7e1daa35ed4c2955f12a647863abc8c50e21a8adf5a13babf8179bcd were already spent and the spending tx was included 2 blocks ago... There are 3 options:
1) you're using some kind of web wallet that just generates a deposit address for their hot wallet, tracks incoming transaction and keeps an internal database of funds attached to your username
2) the problem was fixed, and you already sent the funds somewhere else
3) you were hacked... Either you have a copy/paste virus, somebody has your wallet seed, your web wallet credentials were hacked (phised),...