I downloaded a drawing onto my tablet with a dwg file type. I have an application call CAD Touch Pro that is meant to open those type of files. I have even used the app to create drawing and save it as a dwg file. However, when i try to open the dwg file downloaded onto the tablet, i get a message saying there are no apps on the device that support the dwg file format. I dont have an option to select an app to open the dwg file. Any idea what the problem is?