Queries :: Filter Records Depending On Subform Value?

I have a database that tracks Construction projects. Each project can have multiple Managers, so I have a many to many relationship set up with tblProjects, tblProjects_Managers and tblManagers. I created frmProjects and sbfrmProjects_Managers. sbfrmProjects_Managers has a combo box control and is continuous. Its record source is tblProjects_Managers, its control source is ManagersID (the foreign key in tblProjects_Managers) and its row source is SELECT tblManagers.ManagersID, tblManagers.Managers FROM tblManagers ORDER BY tblManagers.Managers;. The bound column is 1, the column count is 2, and the widths are 0";4". When adding sbfrmProjects_Managers to frmProjects I made the child-master link with ProjectsID, the PK of tblProjects and the other foreign key in tblProjects_Managers.

I need the Managers to be able to do a search that will return only the projects that they manage. I've tried making a query composed of tblProjects, tblProjects_Managers, and tblManagers. I used the field ProjectsID from tblProjects and ManagerName (with the criteria Like [Manager's Name] & "*") from tblManager. The query worked when run by itself, but when I use it as a filter in a macro to open frmProjects, I get two prompts to enter a value, one that asks for tblManagers.ManagerName and one that asks for Manager's Name. No matter what I do I can't get only the second dialouge box to appear, and regardless I no matter what I enter into the two dialogue boxes my results aren't filtered at all.