Newer file formats cannot be opened in older versions of AutoCAD. There are couple of methods you can try out to preserve the layout.
1) Save the file to a previous format within the “Save Drawing As” dialog box.
2) If the current AutoCAD product is not available, use DWG TrueView (free Autodesk file viewing software) to convert the file using the DWG Convert feature. You can download DWG TrueView from here.
Hope it helps.