[AccessD] Opening an Access application multiple times

I am trying to open an access application more than once - two instances open at the same time. 
When I double click the FE (in explorer) it opens.  When I go back to explorer and double click it 
again, it just switches me back to the open instance.  Shouldn't it open the application a second time?

When, from a batch file, I so something like "SomePath\Access.exe" SomeAccessFe.mdb it in fact opens 
the application a second time.

I can live with having to open it from a batch file but I am just wondering why this is happening.

-- 
John W. Colby
www.ColbyConsulting.com