We made a Labview programme to measure the I-V curve of Diode in Labview 8.6. After upgrading the Labview from 8.6 to 2009, the programme does not work any more with the error shown below. From the reason analysis, I think it might be the reason in VI server setting, but I could not figure out why. In the VI Server setting, I chose TCP/IC with the port to be 3363. In the Web Server setting, I enabled Web Server the HTTP port 80. Could anyone tell me why my programme is not working well in Labview 2009? Thanks! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Block name: URL Get HTTP Document VI Error 66 occurred at TCP Read in NI_InternetTK_Common_VIs.lvlib:TCP Buffered Read.vi:2->NI_InternetTK_Core_VIs.lvlib:URL Get HTTP Document.vi:1->Eth_HV_Manual.vi Possible reason(s): LabVIEW: The network connection was closed by the peer. If you are using the Open VI Reference function on a remote VI Server connection, verify that the machine is allowed access by selecting Tools>>Options>>VI Server on the server side.