Phone being detected as CD Drive even if it is connected as Media device (MTP)

I am not able to access the Internal Storage and SD card content from PC because of this issue. Whenever I connect my device to the PC, the device is shown as CD Drive HTC Sync Manager. Several times I set 'Media device (MTP)' from 'USB computer connection'. But even after several attempts the PC is treating the device as CD drive only. I connected my device with other PC's also. But no use. Please anyone help me with this issue.