Hi friends

I am working on USB communication between PIC32MX575F256H(As a device) and PC.

I have Microchip PIC32 USB Starter kit. and also circuit with PIC32MX575F256H which is design by me.

I have some sample code for USB CDC serial communication for PIC32 USB starter kit.

My problem is that.

When i wrote this code in starter kit, it work well.
But when i wrote this code in my circuit(PIC32MX575F256H), it doesn't work

Here, i have only change device selection in IDE Configure menu, But code is as it is.
I have used 8 MHz regular crystal(two leg) in my design as in starter kit (four leg crystal).

I have used four wire for USB connection

GND, D+, D-, Vbus(here, i am not connect USBID pin, is it needed?)

I have checked using two LED blinking controlled by PIC that my circuit design with PIC32MX575F256H working properly.

What is problem?

Please, Help me

Thanks in Advance

Shyam