I can't too, and i pointed this out to OP earlier in this thread and his reply is that he has successfully traded amounts to the tune of $70,000 and $80,000 previously, these amounts i believe are even too large to be done in one transactions and OP was lucky that this selective scam exchange processed those transactions. What's done is done though, and OP cannot drown in regret, but if he is going to get his money back, i am sure it will take a long time.
I do not think Op will get the money back. I want to ask to the OP if the OP got the payment then whats is the wrong behnd this scam. I think there might have another reason as the exchange site may considered this amount is high but previous doesn't seems to them as a large transaction.