[AccessD] Can't delete records from this table

I have a table where if I create a simple query - join tblX to tblY on PKID,
turn into delete * - it gives me the message "can't delete records from this
table".  Yet if I turn it back into a select query I can highlight records
and delete them.  

Any ideas why?

John W. Colby
Colby Consulting
www.ColbyConsulting.com