[AccessD] Problem when trying to save 2007 ACCDB as "2002-2003"

We have one 2007 ACCDB that we would like to save as "2002-2003".

 

Each time we try to do this via the Access 2007 / Office Button / Save
As,

we receive this message "You attempted to open a database that is
already opened by user"...

 

When we try to save other 2007 Access databases as "2002-2003" we have
no problems.

 

What should we look for?  We must be missing something.

 

Thanks,

Brad

 

PS.  We found that "batch" method of migrating 2003 to 2007 - this works
nicely.

 

Is there a "batch" method to go the other way (2007 to 2003)?