Asynchronous Client Server Application-Please Help

Hello Everybody: I am creating a client server application asynchronously. I am storing the listener and the thread in a hashtable and then getting that connection from the hashtable .However when I access the connection the BeginReceive method does not work.Can anyone pls tell me what is the problem. Thanks in advance.. Kapil public class CSocketPacket { public System.Net.Sockets.Socket thisSocket; public byte[] dataBuffer = new byte[1]; public Hashtable threadtable= new Hashtable(); // storing thread and connectID public Hashtable sockettable= new Hashtable(); // storing socket and connectID } public void WaitForData(System.Net.Sockets.Socket soc) { try { if ( pfnWorkerCallBack == null ) { pfnWorkerCallBack = new AsyncCallback (OnDataReceived); } CSocketPacket theSocPkt = new CSocketPacket (); theSocPkt.thisSocket = soc; if (connectId < 10000) connectId++; else connectId = 1; if (theSocPkt.sockettable.Count < MaxConnected ) { while (theSocPkt.sockettable.Contains(connectId) ) { Interlocked.Increment(ref connectId); } lock(this) { // it is used to keep connected Sockets theSocPkt.sockettable.Add(connectId,m_socListener); // it is used to keep the active thread theSocPkt.threadtable.Add(connectId, tcpThd); } } int realId= connectId; soc =(Socket)theSocPkt.sockettable[realId]; while(true) { if(soc.Connected) // now start to listen for any data... { soc.BeginReceive (theSocPkt.dataBuffer ,0,theSocPkt.dataBuffer.Length ,SocketFlags.None,pfnWorkerCallBack,theSocPkt); } } } catch(SocketException se) { MessageBox.Show (se.Message ); } }