Cant upload files with file manager

I am making a project with the following entities: a student, a studentassistant. if a student login then he goes to a form page. if the studentassistant logins then he goes to a studentassistant home page. i made a microflow to check if the user logging in is a student or studentassistant. this works well. the problem i encounter is that for the student page there is a form to fil in. here the student has some options to answer. the student also needs to upload back/front of his identification and here it goes wrong. i put a data view and set the entity as page parameter student. but some how the file manager wont be connected to the database.