Raghunath S

I have a Digilent HS2 Rev. A cable with me and i am using Xilinx ISE 13.1 for programming an Xilinx XC3S400FTG256 FPGA. The iMPACT tool in ISE isn't able to detect the JTAG HS2 cable. While the Digilent ADEPT tool is able to detect the Cable, but unable to detect the FPGA on the board. Can someone guide me what wrong am i doing? Note: All the 6-pins of the JTAG is connected correctly and verified.