Read Only Effect In Query...

Hello,
I'm having a little problem with an Access Query. Simple table design, with relationships as normal, using a junction table for a many-to-many link.

Table1
Field: Area (Text)
Field: T1_ID (AutoNumber)

Table2
Field: T2_ID (AutoNumber)
Field: Value (Double)

Table3Join
Field: Area_ID (Long Integer) *Rel: Table1.T1_ID
Field: Value_ID (LongInteger) *Rel: Table2.T2_ID

Table4
Field: T4_ID (AutoNumber)
Field: Area (Number) *Rel: Table1.T1_ID
Field: Description (Text)

Query1
Sources: Table4, Table3Join, Table2, Table1
Fields: Description, Area, Value

SQL:

SELECT Table4.Description,Table4.Area,Table2.Value
FROM Table2 INNER JOIN ((Table1 INNER JOIN Table4 ON Table1.T1_ID = Table4.Area_ID) INNER JOIN Table3Join ON Table1.T1_ID = Table3Join.Area_ID) ON Table2.T2_ID = Table3Join.Value_ID;


However, with this design as it is, I cannot "edit" the Description field, or change the Area field. The entire Query becomes read only. Why is this? And how should i re-write this to allow me to use the relationships which Link Table2.Value to the appropriate Table4.Area (and display them both in one query), while allowing me to edit all the sub fields.

Thanks
Jaeden "Sifo Dyas" al'Raec Ruiner

Using: Access XP 2002 (10.4302.4219) SP-2