I don't know what you mean by executable file in 2003.
The problem is that when I start Access I get a message that:
"Microsoft Access can't find the database file 'MyWorkGroup.mdw'"
I realy don't anderstand how Access looks for this file since 2010 does not require an .mdw to operate. I suspect that therea are some garbage left from previous installation of 2003 (now it is uninstalled).