Add New Button Disabled

[qbc]

Hi,
I have a form based on a query which is based on 13 tables. I have noticed that on the form, the add new button is disabled. Anybody have any thoughts?
The structure is as follows,

Main Table - Primary Key (ABC1)
Location1 Table - Primary Key (ABC1)
Location2 Table - Primary Key (ABC1)
Location3 Table - Primary Key (ABC1)
Location4 Table - Primary Key (ABC1)
Location5 Table - Primary Key (ABC1)
Location6 Table - Primary Key (ABC1)
Location7 Table - Primary Key (ABC1)
Location8 Table - Primary Key (ABC1)
Location9 Table - Primary Key (ABC1)
Location10 Table - Primary Key (ABC1)
Location11 Table - Primary Key (ABC1)
Location12 Table - Primary Key (ABC1)

All the primary key fields are connected to the primary key in the Main Table.

Any help would be much appreciated.

[June7]

Are these tables identical in structure (same fields)? If so, should be one table with another field for the Location identifier.

You say the Navigation bar new record button is not available? What is the form's setting for Allow Additions property?

[qbc]

The forms setting is set to allow additions.

[qbc]

I just noticed that I can edit any of the current records either. Can anyone help please?

[qbc]

Sorry, I meant I cannot eidt any records.

[June7]

Post the SQL statement for analysis or the project itself.

The 12 tables each have 1-to-1 relationship with main table? The issue could be the join type in the query.

Why 12 tables instead of 1? Are these tables really different?

[qbc]

Thansk for everyone's help. I figured it was something in the relationships between the tables. Thanks again.