NowFlash Programming Error No. 199

I did an FMzPLL analyze yesterday and set the final PLL out to 200MHz.
It lost the connection unexpectedly. I tried to re-install this system, but still unsuccessful even when I tried the trial version software.
Please see the error below:

Error:
NowFlash has encountered an error while erasing the device.
Please ensure that the device is properly connected and then try running the demo again.
NowFlash Error #:199
Please see nowFlash user guide for more information.
