Key violation in Access tables

[ahmadbaseet]

Hello every one. In Access database, I have two tables which are connected by One-to-Many relationship. like:. 1 is Projects, 2 is subprojects. I am tryin to enter the data bay sql statement, But i am getting the Key voilation Error. Can anybody tell me what could be the problem. Thanx

[JKing]

Are trying to insert autonumbers?

[ahmadbaseet]

No I am not entring Auto numbers field

[JKing]

Could you post the code you're using and could you please include the MetaData for all relevant datasets? Here is an example of how to post table MetaData :

Table Name=tblStudent

[i]Field; Type; IndexInfo[/i]
StudentID; AutoNumber; PK
Family; String; FK
Name; String
University; String; FK
Mark; Numeric
LastAttendance; Date/Time