Cannot Get Comboboxes To Display Correct Information

I have 3 databases: Subject, Class, and Students. In the Subject database, I have SubjectID and SubjectName and the PK is SubjectID. I have the releationship bound to the Students table where I only have the SubjectID in there. Next in the Class database I have ClassID and ClassName. ClassID is the PK and it's relationship is bound to the Students database where I only have the ClassID in there. Here is what I am having troubles with.I have comboboxes set up on a form to where the user can select which class and which subject the student is good at. What I want to do is to be able to insert those values into the Students table so that the values will make the correct Subject and Class name appear on the students record. I also want to be able to modify said Subject and Class ID, which when you click on the button, brings up another form to edit Student info, such as name, address, phone number, etc.

I am not sure what I am doing wrong. I take the comboboxes and display them on the form. For the datasource I use the Class for one and Subject for the other. The display member is Subject name or Class name and the value member is either class ID or Subject ID. When I run the project though, the class name and subject stay the same for all the students. I have sample data in my tables that is different for each student, but it does not work.