XDS510 USB PLUS EMULATOR CONNECTION PROBLEM

SIR,

i am working on tms320c6455 . i am using spectrun digital emulator xds510 usb plus.

while i am working after device power off then on then my emulator is not working . and usb is not reconize and drivers are missing. before i have work on same emulator and kit. at that time its working properly.

error is as below while opening ccs3.3v

Error initializing emulator

I/O Port = 510

Board Name: DSK6455_XDS510USB
Cpu Name: cpu_0

while trying to solving problem using sdconfig.

>> XDS510-USB Emulator not connected/enumerated

>> Could not open emulation connection

in device manager window it shows unknown device.

so please help me to solve this problem as soon as posible

thank you.