VS 2010 (C#)

I have created new connection to MS Access database 2007 per steps in
https://www.experts-exchange.com/questions/26984518/VS2010-C-and-MS-Acces-2007.html

I also created *.edmx file . If I rigth click and chose 'Update model from Database''...Update Wizard appears....But my connection to MS Access DB is NOT SHOWN  in the drop-down 'Which data connection should your application use to connect to the database''....How can I add the above connection to MS Access database 2007 to the drop-down???

Thanks