title: OPC server access remotely using OPCDA.NET tools
body: <p>I am developing OPC Client in windows C#. I have developed the code and reading
  OPC Items on Sampling as well as event based (OnDataChange). When I am
  working with local machine then my code works fine with both Sampling as well
  as OnDataChange, but when I am trying to read data from Remote OPC Server
  then Sampling works fine but I am not able fetch data on event based process.
  I am able to connect to the OPC Server but when i am adding subscription to
  it then i am getting error.</p>
  
  <p>HRESULT : 0x80040202.</p>
  
  <pre><code>       group1.DataChanged += new DataChangeEventHandler(this.DataChangeHandler);
                 group1.AdviseIOPCDataCallback();//exception HRESULT : 0x80040202.
  </code></pre>
  
  <p>OPC server connected &amp; then register the group also but i got the exception when reading data.</p>