Please share the firmware(entire project) that you are using
Could you able to see the device in the device manager after programming the device?
I don;t understand your response.
Are you using Bulkloop example provided with CY3674 DVK? If not please share the firmware.
What do you mean by "i could able to see C2 load"?
Have you installed the Cy3674 DVK ? If not install the Cy3674 DVK from the link http://www.cypress.com/?rID=14317.
Try to manually bind the drivers. Check whether there is an unkown device in the device manager with the VID/PID 04b4/1004.
Please refer the document" CY3674 Development kit user guider " chapter 6.