USB CDC abstract control model driver Issue

Hi,

We are using TMS320C6746 high speed DSP core processor based customized board for one of Our Project. We are using inbuilt USB  core of  TMS320C6746  as USB peripheral/device in our project for USB based application .

we are using USB  CDC  abstract control model for device.

I am able to receive the Get line code command from host after the device configuration and also able to setcontroline code command from Host but after that setcontrolline command USB device enter into suspand mode and we are not able to open the Port.

Regards

Raj kumar