Idenity key value(primary key) send to another Table as Foreign key

Question

Hi friends,
i have one table named Proj_KitDetls in which there is a Column named Id which is Identity key & primary key.and another table named Proj_kitInvDetls in which i m saving the Identity key of Proj_KitDetls as Foreign key,
but i am not able to set the values in Proj_kitInvDetls.
example: in Proj_KitDetls tables values are set in DB like this:

Id,CTNo,Kitname,KitType,BudgetUnits
86,4,CASS30KIT90,Combo Kit,10

Proj_kitInvDetls another table has value like this:
KItd(primarykey),Id(Foreignkey),Invoice_Id,Units
16,8,3,9

the value 86 is not getting set in place of 8 in Table Proj_kitInvDetls.

need help
aamir