Creating new records problems

[mech55]

I'm recently began getting a data exception whenever I try to create a new record. Basically I get a dataexception message that says that my primary key cannot be null whenver I click the button that supposed to add new records. Here is my code, Thanks for any help.

Try
Me.BindingContext(Dsfr1, "Radios").EndCurrentEdit()
Me.BindingContext(Dsfr1, "Radios").AddNew()

'some non related code

Catch ex as DataException
Msgbox(ex.Message)
end try