Please refer to attached file. I have a FlexSeries[EPF6024AQC240-2&EPC1441PCB] on Board,USB Blaster,Quartus software Ver9.0,Install Program[pof file&sof file] And I want to Install Program file to [EPF6024AQC240-2&EPC1441PCB]. But appear error. Error:JTAG chain problem detected Error:No device detected Error:The TD0 connection to the download cable might be shorted to GND or is an open circuit Error:The TCK and TMS connections to the last device might have problem Maybe It's in the state that ,can't communicate. Is special setting needed there? Please give me your advice.