c++ FTP2 Upload Percent

I have set the following:

_ftp.put_EventCallbackObject(&_ftpProgress);

_ftp.put_Hostname(_host.c_str());
_ftp.put_Username(_user.c_str());
_ftp.put_Password(_password.c_str());

_ftp.put_Passive(false);
_ftp.put_HeartbeatMs(250);
_ftp.put_SendBufferSize(4096);

But i am never getting calls to my FtpPercentDone method. Only AbortCheck