Multicolumn Primary Key && Referential Int.

I'm trying out this database layout under MS SQL (de), with primary multicolomn key, but ....


Let's say table A, has primary KEY on the field PK_A
Let's say table B, has primary KEY on the field PK_B

Now table C, has fields ID_A and ID_B, defined as multicolomn primary key, referencing obviuosly to the PK_A and PK_B values.



NOW THE PROBLEM !! :(

Let present you table D , with his beautiful field ID_C. :)
How can I succed in referencing with the ID_C field the primary multicolomn key of table C ??

I' designing the whole thing with access97+mde, but dragging the PK key of table C (ID_A & ID_B) over the table D (ID_C) doesn't work !!

Any help ??

Thanks in advance !!

H2O