I am facing an issue in exporting to CAD from Revit. I am linked a CAD Mechanical base file to Revit MEP 2012. And I created the Sheet file in Revit MEP 2012 and now trying to export it to Autocad format. But I am not geting the proper CAD layers and the colour properties as it is. It is changing the colours and layers to different one. How can I rectify this. Kindly help. Thank you in advance.