USB Enumeration control request failed to complete, Device disconnected

[NEIL4]

USBFS Enumeration control request failed to complete, Device disconnected

Im using stack(lpcusblib_MassStorageHost), 
In enumeration stage, D+ goes low periodically, we are getting error,

Mass Storage Host Demo running.
Dev Enum Error
-- Error port 0
-- Error Code 3
-- Sub Error Code 2
-- In State 7

Could you please provide any suggestions, in HW point of view

[Omar_Anguiano]

Hello
Hope you are well.
It will be helpful if you provide me the part number of the device you are working with.
Do you have the 15k pull-down resistors on D+ and D- lines?

If you have more questions do not hesitate to ask me.
Best regards,
Omar