记录集不可更新访问2010

Question

I am using SQLServer 2012 with my access 2010 project (.adp). I am wanting to update the information in the following form however when I attempt to make changes I am given the warning 'the record set is not updatable' I created a view in SQL for the form, all my other views and forms in the project update just fine. I have all the correct permissions. Is it down to the 'tblEnrolements'? See the images below to see my database diagram with the relationships set up and also the form I am trying to edit.

Answer 1

I had not created a composite key! Hopefully this will be useful to someone else!