CAD drawing is not opening in DMS ECL viewer

Hi Experts,

I have attached & check-in the AutoCAD drawing in document of DMS server.

Now I have double click the the above documents in CV02N or CV03N, the CAD document didn't open & I get the following message:

A pop-up come with 2D Viewer: Unable to Open document, After click on OK button following message displayed:

" File C:\_User_PS301 is not a valid format "

FOllowing setting done in customizing:

Type(Data Car) Appl   Applicaion Type   Desciption    Application Path & Program

LO     ACD     1     Autocad     %EAIWeb.webviewer2D.1 %SAP-CONTROL%

LO     ACD     2     Autocad     %EAIWeb.webviewer2D.1 %SAP-CONTROL%

LO     ACD     3     Autocad     %AUTO%

Please suggest what can be done

Regards

Bipin Shrivastav