Socket not opened at third time

Hello All!
I have a problem with socket in OAT 3.10

I Open a socket by ed_SocketTCPStart at first time
I receive an event ED_INFO_WAITING_FOR_DATA in tcp_pfResponseCbk.
I Send data to server
I receive a server answer data in tcp_pfDataHnd and receive ED_OK_TCP_CLOSED event in tcp_pfResponseCbk because socket closes at server side.
All is OK - transaction finished

I make a second transaction - all OK

But when I try to make a transaction in third time, I do not receive ED_INFO_WAITING_FOR_DATA event in tcp_pfResponseCbk and socket not opened.
All next attempts is not success.

Is anybody know what is the problem?