This usually means your drivers aren't installed correctly. Re-install the SPD USB Drivers and try a different USB port.
Have mismatched DDR2 sticks that refuse to dual-channel? By editing the latencies on one module to mirror the slower stick, you can force compatibility and unlock dual-channel mode on old Core 2 Duo or Athlon 64 systems. spd upgrade tool r4.0.0001
Flash Firmware/Unbrick Philips S326 by SPD upgrade tool R4.0. This usually means your drivers aren't installed correctly