Problem with socket sending/receiving data

[chycai]

I am newer with symbian,I want to connect symbian OS with PC(winXP) by socket,the symbian OS as client,PC as the Server. I can create the connect between them,but I can't send/receive data between them normally.
On first and second session the client and the server are correct,but on the third session the server can send data correctly,but the client(symbian os) can't send data to server and the connection is OK. Anyone know the reason? I worry about it all the times. Here my part source code are:
The Client:

iStatus = KRequestPending;
iSocket.Connect(iAddress, iStatus);
User::WaitForRequest(iStatus);
if (iStatus.Int() ==KErrNone)
{
TSockXfrLength iDummyLength;
TInt recvSize;

for( ; ; )
{
//iStatus = KRequestPending;
//iSocket.Connect(iAddress, iStatus);
//User::WaitForRequest(iStatus);
recvSize = 0;
iStatus = KRequestPending;
iSocket.RecvOneOrMore(recvBuf, 0, iStatus, iDummyLength);
User::WaitForRequest(iStatus);
recvSize = iDummyLength();

if(iStatus.Int() ==KErrNone)
{

if(recvSize !=0)
{
//LaunchAppL();
//LaunchPyScriptL(recvBuf);
recvBuf.FillZ();
recvSize =0;

iStatus = KRequestPending;
iSocket.Write(writeBuf,iStatus);
User::WaitForRequest(iStatus);
}
else
{
break;
}
}
else
{
break;
}

}
}

The Server(winsocket):
int i=0, length = 0;

while(!done)
{
memset(buff1,0,sizeof(buff1));

if(i == 4)
{
done = true;
}
for(i=0; i<4; i++)
{
strcpy(buff1, "test.py");
send(sc,buff1,getSize(buff1),0);

memset(buff2,0,sizeof(buff2));
recv(sc,buff2,1024,0);
length = strlen(buff2);

if(length !=0)
{
cout<<"Received msg:";
cout<<buff2<<endl;
buff2[length-1] = '\0';buff2[length-2] = '\0';

}
}

}
Thandks in advance.

[symbianyucca]

Have you tried with sockets example already ?
It is known to work, as well as you could copy the Active object usage from it to make your application to respond better.

[chycai]

To symbianyucca:
I have tested with the symbian sockets——a sample,but it has the same problem. My server codes can communicate with j2me clint socket codes well, but can't work with symbian socket. What a strange thing!

[symbianyucca]

What happens in there ?
What gets executed in teh device, and what doesn't ?

[nmnir]

try removing iStatus = KRequestPending;

Nahum